To answer this question, you need to know the inventor of Bakelite, which is a type of plastic.

Option A) Charles Goodyear - This option is incorrect because Charles Goodyear is known for his invention of vulcanized rubber, not Bakelite.

Option B) Leo Hendrik Baekeland - This option is correct. Leo Hendrik Baekeland, a Belgian-born American chemist, invented Bakelite in 1907. Bakelite was the first synthetic plastic and was widely used in various industries.

Option C) Roy Plunkett - This option is incorrect. Roy Plunkett is known for his discovery of Teflon, a nonstick coating, and not Bakelite.

Option D) Henry Ford - This option is incorrect. Henry Ford is known for his contributions to the automobile industry, particularly for the development of the assembly line and mass production techniques. He is not associated with the invention of Bakelite.

The correct answer is B) Leo Hendrik Baekeland. He is credited with inventing Bakelite, the first synthetic plastic.

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To answer this question, you need to have knowledge about the history of flight and the pioneers in aviation.

Option A) Leonardo DaVinci - This option is incorrect. While Leonardo DaVinci did sketch designs for flying machines, including gliders, there is no evidence that he actually built and tested a functioning glider.

Option B) The Wright brothers - This option is correct. The Wright brothers, Orville and Wilbur Wright, are credited with designing and building the first successful airplane. They conducted extensive research, including glider experiments, and made significant contributions to the development of aviation.

Option C) Francis Rogallo - This option is incorrect. Francis Rogallo was an American aeronautical engineer who is known for inventing the Rogallo wing, which is used in modern hang gliders and paragliders. However, he did not design the first hand glider.

Option D) Galileo - This option is incorrect. Galileo Galilei was an Italian scientist and astronomer who made important contributions to the fields of physics and astronomy. While he studied the principles of flight and made some theoretical contributions, he did not design the first hand glider.

The correct answer is B) The Wright brothers. They designed and built the first successful airplane and made significant advancements in aviation.

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• Wrong explanation