Two black guinea pigs were crossed and they produced a litter of 4 black and 3 white guinea pigs. which best explains this occurrence?

One of the guinea pick had the BB allele while the other had the BW allele

Humans have come to value salt marshes and now seek to preserve and restore them and this is the way human use of salt marshes have changed over time. The correct option among all the options that are given in the question is the first option or option "a". These marshes provide abundance of marine life and also helps to create a natural balance.