Question

biological carbon acts on a timescale of ​of years.
a hundreds
b thousands
c millions
plants, algae and phytoplankton are the main components of the ​carbon cycle.
a fast
b slow

Explanation:

1. Biological carbon (e.g., carbon in living organisms, decomposition) cycles relatively quickly, typically over hundreds of years.
2. Plants, algae, and phytoplankton drive the fast carbon cycle via photosynthesis and rapid biological processes.

Answer:

1. A. hundreds
2. A. fast