Spain helped the Colonial army during the American Revolution by building ships for American use.
keeping the British navy occupied.
forcing General Cornwallis to surrender.
trapping the British on a peninsula at Yorktown.

Correct answer is keeping the British navy occupied.

Explanation:

Although revolutionist had small navy during the war, first option is not correct as they weren't made by Spaniards.

Second option is correct as Spain fought with Britain in British West Indies, which occupied part of their troops.

Third and fourth options are not correct as Washington's army was the one that did this two mentioned things.

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

answer; i believe that the correct answer is (decreased)