Question

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

Explanation:

• Biodiversity refers to the variety of life, not related to "locking" elements.
• Sequestration is the process of capturing and storing (locking away) substances like carbon so they aren't immediately available for use.
• Respiration is a biological process of gas exchange (e.g., using oxygen, producing CO₂), not about locking elements.
• Combustion is burning, releasing energy and gases, not locking elements.

Answer:

B. sequestration