Fact 1: Evolution occurs in response to a change in the environment.

Fact 2: Biological evolution refers to changes in successive generations of a species.

Given the two facts above, answer the question "Change happens to what of a species in response to changes in the environment?" with the following options: 
- only females
 - colors of the spectrum
 - It helps them survive
 - only males
 - successive generations
 - By wind and rain
 - stagnation
 - characteristics


 

     successive generations    