Decomposers act on dead bodies converting complex organic constituents into simpler soluble form. They obtain their energy from dead organisms. Decomposers themselves are organisms (often fungi, earthworms, or bacteria) that break down organic materials to gain nutrients and energy. Decomposers accelerate the natural process of decomposition. They supply the required nutrients for other trophic levels. The fungi found on the tree are decomposers. When an organism dies, it leaves behind nutrients that are tightly bound together. A scavenger might eat the carcass, but its feces would still contain a considerable amount of unused energy and nutrients. Decomposers will later induce further breakdown. This last step releases raw nutrients (such as nitrogen, phosphorus and magnesium) in a form usable to plants, which quickly incorporates the chemicals into their own cells. This process greatly increases the nutrient-load of an ecosystem, in turn allowing for greater biodiversity.

Correct Option: D

Decomposers act on dead bodies converting complex organic constituents into simpler soluble form. They obtain their energy from dead organisms. Decomposers themselves are organisms (often fungi, earthworms, or bacteria) that break down organic materials to gain nutrients and energy. Decomposers accelerate the natural process of decomposition. They supply the required nutrients for other trophic levels. The fungi found on the tree are decomposers. When an organism dies, it leaves behind nutrients that are tightly bound together. A scavenger might eat the carcass, but its feces would still contain a considerable amount of unused energy and nutrients. Decomposers will later induce further breakdown. This last step releases raw nutrients (such as nitrogen, phosphorus and magnesium) in a form usable to plants, which quickly incorporates the chemicals into their own cells. This process greatly increases the nutrient-load of an ecosystem, in turn allowing for greater biodiversity.

Due to majority of phytoplanktons.

Correct Option: B

Due to majority of phytoplanktons.

Food is necessary for life.

Correct Option: C

Food is necessary for life.

The oceans cover about 2/3 of the whole surface of our earth. Thus it is the most stable ecosystem, because of buffering action by water.

Correct Option: D

The oceans cover about 2/3 of the whole surface of our earth. Thus it is the most stable ecosystem, because of buffering action by water.

The decomposers act on the dead organic matter and break them down into simpler compounds and minerals.

Correct Option: C

The decomposers act on the dead organic matter and break them down into simpler compounds and minerals.