Which of the following describes how farmers and ranchers changed the
great plains?
(1 point)
a. the land became difficult to farm.
b. farmers and ranchers began fencing the land.
c. the area turned into a desert.
d. the area became an important buffalo preserve.

Often, a goby fish and a shrimp will live together in a burrow the shrimp has dug in the sand. the shrimp is almost blind and therefore is unable to see predators approaching when he is outside of the burrow. when the shrimp is in danger, the goby fish touches the shrimp with its tail to warn him. then, both go back into their burrow for safety. which type of relationship does this represent? a. mutualism b. parasitism c. commensalism d. predator/prey