Migration is a adaptation.
a. structural
b. functional
c. natural
d. behavioral

The answer is d. Behavioral

Behavioral adaptation are things all living organisms do in order to survive. Sometimes, it's important for organisms to move to another place which have more resources to support their living ( migration). It just organisms' basic instinct to survive

The electoral college consists of 538 electors. a majority of 270 electoral votes is required to elect  the president. your state's entitled allotment of electors equals the number of members in its congressional delegation: one for each member in the house of representatives plus two for yoursenators.congress does the electoral college represent

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.