Question

1. what do we call big changes that occur over a long time?

evolutionary changes
climate changes
chemical changes
hereditary changes

Explanation:

Evolutionary changes refer to gradual, significant transformations over long periods, such as biological evolution. Climate changes are specific to weather patterns, chemical changes involve substance composition shifts, and hereditary changes relate to genetic traits passed down. The question describes big changes over long time, which matches evolutionary changes.

Answer:

A. evolutionary changes