Question

The dead remains of plants and animals are the major source of energy for autotrophs.

• A. Herbivores
• B. Tertiary consumers

Answer 1

The correct option is B Tertiary consumers

The autotrophs are the organisms which prepare their own food. For example, the green plants are autotrophs because they prepare their own food through the process of photosynthesis.
Saprotrophs or decomposers include microbes such as bacteria and fungi that decompose the dead remains of plants and animals. During this process of decomposition, saprotrophs break up these remains into an organic and inorganic matter. Organic matter acts as a food of the decomposer while inorganic matter eventually gets reused as raw materials by the producers.