Metamorphic rocks that melt in a hot fluid can re-crystallize into a different form of rock.

True

Explanation:

If we have already formed metamorphic rock, but then it comes into a situation where a very hot fluid melts it, then the chances are that that rock will recrystallize and form different form of rock. The reason why this would happen is because it is very likely that the temperature and pressure to which the rock will be exposed will be different than when it was initially formed, which will influence its structure and composition. Another thing that will influence is the composition of the hot fluid, as it will mix with the molten rock, thus giving it different properties from the original ones.

true

Explanation:

it will increase due to the time span

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.