Question

8. In which ecosystem do the physical conditions change most rapidly and most widely

Kelp forest

Coral reef

Intertidal zone

Open ocean

Answer 1

Answer

The living organisms and the environment surrounding it constitute the ecosystem. These ecosystems are of three types – fresh water, terrestrial and ocean ecosystems.

Kelps are large brown sea weeds that grow in underwater areas. These are known as kelp forests. A variety of fishes also grow here.

Corals are invertebrates that live in marine water and grow in polyps called coral reefs and are stony in nature. They form the underwater ecosystem.

The shoreline of marine water gets exposed to air when there is a low tide. This is termed as intertidal zone. Organisms like crabs, barnacles, sea stars, snails, etc.. grow in such areas.

The topmost layer of the oceans is exposed to the sunlight. Mostly, species of seaweed grow here. It includes the region above the continental shelf. It covers all the sea regions. So, there exists wide range of change in physical conditions like temperature, light, pressure, nutrients, light, and the water composition.

Therefore, option D open ocean is correct.