Answer:
The correct answer is b. 50 kg
Explanation:
Deer is a herbivorous animal that does not consume meat. In order to fulfill it's nutritional needs, they rely on plants, grass, bushes and trees.
However, these do not have a large amount of solid matter. They have a huge water content and the dry mass found in these food sources is quite low.
Hence, even if a deer consumes 500 kg, most of it will be water. Only approx. 10% of that weight will be converted into biomass.