He bought Louisiana Purchase, launched the Lewis and Clark expedition and wrote the Declaration of Independence
The action taken by the first continental was that they voted to boycott all trade with Britain until Parliament stopped taxing the colonies.
The first major accomplishment that this congress had was that they voted that all British goods be boycotted in the colonies until the intolerable acts were overturned.
They also voted not to buy British goods or sell any good from the colonies to the British. This boycott was a way of showing their many grievances to the British who were taxing, and enforcing a lot of restrictions on them.
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You spelled development wrong. Hope that helps, maybe it would in the future for when you wanna get a job.