Can you guess what resource the US is trying to procure by this military action?

I think you are trying to force an incorrect simplistic narrative on the situation. Obtaining natural resources is not an important motivation for US military action with the possible exception of US intervention in the Persian Gulf during the Cold War (and even there I see no evidence that the US was trying to get out of paying the going international rate for the oil as opposed to merely ensuring that willing sellers in the Gulf could continue to transport their oil over the ocean). Venezuela's cooperation with Moscow and Beijing is a much more likely motivation, i.e., US national security.