To determine how much of the energy a plant traps from the sun that it uses for its own energy needs, let's analyze the information provided:
The question gives us multiple choices:
a) 10%
b) 20%
c) 40%
d) 60%
After carefully considering the energy needs of the plant, we determine that 40% of the trapped energy is utilized by the plant for its own metabolic processes and energy requirements.
So, the plant uses 40% of the energy it traps from the sun for its own energy needs.
Thus, the correct answer is:
C) 40%
