NEED help I've been on this for like 2 hours this is about The Columbian Exchange
and pls tell me the answer to all of them and pls tell me if there wrong or not the question I answered, oh and for all of them the options to the questions are
Bering land Bridge
Siberia
Sailors
Small box
Immunity
Mortality
Slave trade

john adams was the 2nd president of the united states.

explanation:

the answer is a) james madison.

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.