What did the first continental congress do to let the king know how they felt?

The First Continental Congress, convened in 1774, aimed to address colonial grievances against British rule. They drafted the Declaration of Rights and Grievances, which outlined their concerns and asserted their rights as Englishmen. This document was sent to King George III, emphasizing their discontent with taxation without representation and other oppressive measures. They also organized a boycott of British goods to demonstrate their resolve and unity in opposing British policies.