Final answer:
Option (1), Bernardo de Gálvez aided the American Revolution by capturing British forts on the Mississippi River and the Gulf Coast, and by allowing American use of New Orleans's port, but he did not help in the Battle of Saratoga.
Step-by-step explanation:
Bernardo de Gálvez played a significant role in aiding the Americans during the Revolutionary War. He was instrumental in capturing British forts along the Mississippi River and the Gulf Coast and allowed American forces access to the strategically crucial port of New Orleans.
This access was a vital logistical support that enabled the transfer of men, supplies, and communication, Gálvez was not involved in the Battle of Saratoga, as this was a separate military engagement pivotal for securing French support for the American cause.