Question

question 3 (10 points)
the carbon cycle describes _______.
a the movement of nitrogen through the environment
b the movement of carbon in ecosystems
c the events that happen when energy is converted into carbon
d the events that happen when carbon is changed into nitrogen

Explanation:

To solve this, we analyze each option:

• Option a: The carbon cycle is not about nitrogen movement, so a is incorrect.
• Option b: The carbon cycle specifically describes the movement (cycling) of carbon through ecosystems (including biotic and abiotic components), so this matches the definition.
• Option c: The carbon cycle is about carbon's movement, not energy - to - carbon conversion, so c is incorrect.
• Option d: Carbon is not changed into nitrogen in the carbon cycle, so d is incorrect.

Answer:

b. the movement of carbon in ecosystems