ratify
Yes. It means "to approve or endorse."Treaties and constitutional amendments are ratified.
Ratify
The Senate has the responsibility of approving treaties.
The Constitution requires the Senate to ratify treaties. Until the Senate approves them, they are not in force. The Senate does not automatically approve all treaties that the President sends to them.
Only Congress.
The US Congress needs to approve treaties the US becomes parties or signatories of. I'm not sure what you mean by UN treaties, however.
The Senate must approve treaties and presidential appointments.
Legislative
The Senate has influence in the area of foreign policy through its power to approve treaties.
pass bills approve treaties approve presidental appointments jury in case of impeachments
In the US, only the Federal Government can do this; states cannot do this individually.
The senate