Answer: crossing over
during the process of fertilization, a sperm and egg join together to create a zygote. since a sperm had half the number of chromosomes and an egg has half the number of chromosomes, when they join together the zygote had a complete diploid set of chromosomes. the assortment of chromosomes and crossing over promotes genetic variation during the process of reproduction
B. Wind.
A abiotic factor is non-living, making a, c and d wrong.
Answer:
Lipids
Explanation:
because they are made of fatty acids, hope this helps your question