It is the graphical representation which shows the biomass or bio productivity in an eco system at each tropical level.

A (elton) is the correct answer.

In the given food chain peacock is the ultimate consumer. It will be located at the apex of the food pyramid. 

Fresh weight of organisms and their body parts comprises of water content along with the actual dry weight. The fresh weight is deviating w.r.t metabolism and availability in the same organism or different organisms taken under observation. This makes the standard comparison difficult. Hence, fresh weight is not used for the construction of the ecological pyramid.

The condition of deficiency and excess of essential nutrient is called as malnutrition. In this, either one or more nutrients like calories, protein, carbohydrates, vitamins, minerals are in excess in diet or deficient in diet. It can be either undernutrition or overnutrition. 

A- Malnutrition is a physical state of unbalanced nutrition. It can mean under-nutrition or over-nutrition. 

Malnutrition means any kind of bad nourishment. It doesn't necessarily mean that you aren't getting a proper diet, it can also mean excessive consumption of food. So eating junk food and a bad diet can cause obesity and that is known as malnutrition as well.

In animals, the structurally similar glucose polymer is the more densely branched glycogen, sometimes called "animal starch". Glycogen's properties allow it to be metabolized more quickly, which suits the active lives of moving animals.

Oxygen is the primary source of living without which life is not possible. Water is also the main source of living. Food and timber are important for the living but if not consumed or used for a few days it will not cause death. If a person stops breathing for some time he will surely die.

Calcium plays ain important role in building and maintaining bones and teeth.calcium is important in the activity of many enzymes in the body. The contraction of muscles, release of neurotransmitters, regulation of heartbeat, and clotting of blood are all dependent on calcium.

Deficiency of calcium is known as Hypocalcemia.

 It occurs when calcium levels in the blood are low. 

Teeth and bones are made up of calcium and its deficiency can lead to dental changes, and osteoporosis, which causes the bones to become brittle. Hence, the deficiency of calcium can make our bones and teeth weak.

So, the correct option is 'make our bones and teeth weak'.

The body requires many different, carbohydrates, vitamins & minerals that are crucial for both body development & preventing disease. The deficiencies of these nutrients for a long time can cause deficiency disease.

The teeth are made up of minerals like calcium and phosphate. The dentine and the enamel of the teeth are made up of calcium. Thus, calcium is very important in the normal growth and development of the teeth and gums and its deficiency can lead to the weakening of the gums.

Night blindness is a nutritional disorder in which person is not able to see at night or in poor light. It is mainly caused due to the deficiency of vitamin A. Vitamin A is retinol that helps in the formation of rhodopsin that helps in vision in low light and hence in the absence of retinol, this pigments will not form and a person will not be able to see in dim light.