El nino poses threat to agricultural production in Southern Africa.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

Answer(a); // soil salinization and waterlogging;

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary.