The biotic values for several different organisms found in a nearby lake are listed below. Organisms with a higher biotic value indicate a healthier body of water If a student sample the
body of water and found 2 Riffle Beetles, 3 Mayfly Nymphs, 6 Clams, 15 Snails and 20 Leeches,
which would be true about the lake ?

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.

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

the answer is c. it will give up it's valence electron to the other atom.