Answer:
a. True
Explanation:
Coevolution is a biological process where pairs of species or among groups of species reciprocally affect each other's evolution through natural selection. This process produces genetic changes in the traits of interacting species that are a consequence of reciprocal adaptation between these interacting taxa. Coevolution occurs when species are ecologically intimate (i.e., they interact with one another), such as the interaction between hosts and parasites or predators and prey.
20 chromosomes because unfertilised eggs contains half the number of bodily chromosomes
A because if they build a mall there the bear have no where to live and they would die out.
I believe the answer you're looking for is fertilization. :D