Activity To model how particles move as states of matter change, Jelani filled a clear box with as many marbles as the box would hold. Then he drew a picture of what the box looked like with the marbles in it.
Part C
Think back to the three models of matter in parts A and B. Which model had a definite shape? Explain.

I think the third one

Explanation:

Because, the third model is filled to the top of the container and  has, made the definite shape of it ( the container)

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.