Question

1. what is a mass extinction? define mass extinction, which all of the major diversity and many many members remain 2. why do species sometimes go extinct? give two possible reasons

Explanation:

1. A mass extinction is an event in which a large proportion of Earth's species go extinct within a relatively short geological time - scale. This can be due to major environmental changes like asteroid impacts or massive volcanic eruptions.
2. Two possible reasons for a species to go extinct are habitat loss (when their living environment is destroyed, e.g., deforestation) and over - hunting (when the rate of killing by humans exceeds the species' ability to reproduce).

Answer:

1. A mass extinction is an event where a large number of species become extinct in a relatively short period of geological time.
2. Two possible reasons for a species to go extinct are habitat loss and over - hunting.