Answer:
Crossing over is important because it increases genetic diversity.
Step-by-step explanation:
Crossing over is a process during meiosis that increases the genetic diversity in the offsprings. During this process, a pair of chromosomes interact with each other to swap genes. As a result, the sister chromatids are no longer identical, which causes offsprings to be different from their progenitors. Also, they give diversity to the species since the chromosomes are different.