They result in population decline. They are all observable in the fossil record. They occur slowly over long periods of time. They are more likely to be observed in plants.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Physical features help animals survive. Which statement best describes physical adaptations that occur through natural selection in changing environments?
Possibilities:
- They result in population decline.
- They are all observable in the fossil record.
- They occur slowly over long periods of time.
- They are more likely to be observed in plants.

They occur slowly over long periods of time.