Question

what does it mean when an element has been sequestered? it completely disappears. it is turned into energy. it is isolated in a stable form. it is released into the air.

Explanation:

In environmental science (a sub - field of Natural Science), when an element is sequestered, it means it is isolated in a stable form. For example, carbon sequestration involves capturing and storing carbon dioxide in a stable form (such as in geological formations or through biological processes like in forests). Elements do not completely disappear (A is wrong as per the law of conservation of mass). Turning into energy (B) is not the common meaning of sequestration in this context. Releasing into the air (D) is the opposite of sequestration.

Answer:

C. It is isolated in a stable form.