One reason a grasshopper population may increase rapidly

Abundant amount of grass or decrease in the number of predators that eat grasshopper.

Explanation:

There can be multiple reasons why the population of grasshopper may increase rapidly. Two of them are:

There might be a sudden increase in the number of greenery in an area which can favor the growth of grasshopper.

The second situation is when the population of lizards or birds eating grasshopper has decreased in number.

not only is it colder, it also becomes darker, less salty, and more dense.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a