Which describes the columbian exchange?

a.
the movement of plants, animals, diseases, and people among continents as a result of european exploration

b.
the migration of europeans to the americas after 1500

c.
columbus's plan for returning to the americas several times

d.
the trade between spanish explorers and native peoples in the americas

the migration of Europeans to the Americas after 1500 is the answer

Explanation:

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.

lol, i think so.

explanation: