Question

what is extinction? explain mass extinction and types.

Answer 1

when all the variety of animals of a species die all over the earth it is known as extinction.
the rate at which animals or birds or other organism extinct is known as rate of extinction.

Answer 2

There are two types of extinction: background extinction, which is a natural part of evolution, and mass extinction, which typically means some form of catastrophic event (such as a volcano eruption or an asteroid hitting the Earth) has decimated plant and animal life.

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