The lost at each trophic level enters the environment as

co2, energy

o2, heat

heat, energy

energy, heat

energy, heat

Explanation:

Only a part of the energy stored in a trophic level goes to the next level since the different organisms that process the energy consume it to perform their vital processes. The rest of the energy is released into the environment in the form of heat:

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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.