Moving through trophic levels a. energy decreases b. entropy increases c. biomass decreases d. all of the above

The correct answer is A) Energy decreases.

Trophic level is a hierarchical level within an ecosystem that comprises of organisms having same functions within a food chain and have same nutritional relationships with respect to the source of energy.

For instance, producers form the first trophic level and all producers synthesize their food through photosynthesis.

As per the 10% law of energy transfer, transfer of energy from one trophic level to the next ( like from producers to primary consumers) is 10% and the rest 90% of the energy is utilized in various metabolic processes and released as heat in the atmosphere.

Thus, energy decreases as we move through different trophic levels.

answer; the above statement is (true);

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.