Read the sentence from the section “Water Sphere.” However, around three-quarters of all the fresh water on Earth remains locked up in the cryosphere.

What is the meaning of the phrase “locked up’ as it is used in the sentence?

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.

the answer is c a tornado

answer: b

coz red blood cells marrow and circulates the body for 120 days.