Tundra is not a major type of ecosystem on Earth. It is a specific type of biome found in the Arctic and Antarctic regions, characterized by low temperatures, permafrost, and sparse vegetation.

Biodiversity refers to the variety of life forms found within an ecosystem, including the number of species, their genetic diversity, and the interactions between them.

Human activities are not a major driver of ecosystem diversity. They can impact ecosystems and reduce biodiversity, but they are not a natural factor that shapes ecosystem diversity.

Forests are characterized by tall trees, a dense understory, and a high level of biodiversity. They are found in regions with ample rainfall and moderate temperatures.

Ecological succession refers to the process by which ecosystems change over time, as species colonize, compete, and interact with each other.

Tundra is not found in tropical regions. It is a specific type of biome found in the Arctic and Antarctic regions, characterized by low temperatures, permafrost, and sparse vegetation.

A food web is a complex network of interconnected food chains, showing the feeding relationships between different species in an ecosystem.

Parasites are not typically considered keystone species. Keystone species are those that have a disproportionately large impact on their ecosystem relative to their abundance.

Habitat modification refers to the process by which humans modify ecosystems for their own benefit, such as through agriculture, urbanization, or resource extraction.

Invasive species are not a major threat to ecosystem diversity. While they can have negative impacts on ecosystems, they are not as significant a threat as climate change, habitat loss, or pollution.

Restoration refers to the process of restoring degraded ecosystems to their natural state, often through active intervention and management.

Promoting economic growth is not a key component of sustainable development. Sustainable development aims to balance economic development with environmental protection and social equity.

Conservation refers to the process of managing ecosystems to ensure their long-term health and productivity, including protecting biodiversity, reducing pollution, and promoting sustainable land use practices.

Tundra is not a major type of marine ecosystem. It is a specific type of biome found in the Arctic and Antarctic regions, characterized by low temperatures, permafrost, and sparse vegetation.

Ecological resilience refers to the process by which ecosystems adapt to changing environmental conditions, such as climate change or pollution, and maintain their structure and function.