Why would trading and fishing communities be more likely to be located on a bay than on a straight section of coast?

I agree with what they said ^^

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.

Ithink its d.stratum