Identify the processes that release CO2 in the atmosphere represented by: A B Vegetation contributes 60 billion tons of CO2 to the atmosphere annually. Which biological process is responsible for this?

Here are the answers to your questions:

1.3
1.3.1 Processes(es) in which enzymes are involved: $\boxed{\text{BOTH A AND B}}$
1.3.2 Movement through cell membrane where movement of molecules are selective: $\boxed{\text{B ONLY}}$
1.3.3 Causes of mass extinctions: $\boxed{\text{BOTH A AND B}}$

1.4.1

*a) A: $\boxed{\text{Decomposition}}$

*b) B: $\boxed{\text{Combustion}}$

1.4.2
The biological process responsible for vegetation contributing 60 billion tons of CO$_2$ to the atmosphere annually is $\boxed{\text{Respiration}}$.