What action must a marine take to accomplish the task of enabling themselves and their marines to assume progressively greater responsibilities in the marine corps and society?

A marine must be trained among other aspects in naval aviation, amphibious operations, they must be trained to fight on land and water. The marine infantry must be well trained because it is the one that controls the maritime safety of the coasts and ports.

To assume more and more responsibilities, they must train strongly in combat and discipline

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt