Explain why these disorders are usually found in landlocked regions far from the coast. Are there ways in which the diets of people in places like Daxin could be supplemented to prevent both disorders?

The answer would be b. it is a learned trait

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.

Yes yes yes very good