Question

what is the term that describes an element (such as carbon) that is \locked away\ and cannot be immediately used?
respiration
biodiversity
sequestration
combustion

Explanation:

• Respiration: The process of gas exchange (like O₂ and CO₂) in organisms, not about locking elements.
• Biodiversity: Refers to the variety of life, irrelevant to "locking" elements.
• Sequestration: Defined as capturing and storing (e.g., carbon sequestration locks carbon away from immediate use).
• Combustion: Burning process, releases energy/elements, opposite of locking.

Answer:

C. sequestration