HELP ASAP PLEASE!!! WILL MARK BRAINLIEST

All of the statements below describe how reproductive isolation drives speciation except .

1.
Behavior- two similar species may have different courtship or mating behaviors.

2.
A reproductive barrier keeps similar species from interbreeding.

3.
If the environment changes suddenly, evolution will be faster.

4.
Timing-two similar species may have different breeding seasons.