Help me out please with 3 all

Hmm.

Explanation:

1. The water cycle (or the hydrologic cycle or the hydrological cycle).

2. Evaporation, condensation, precipitation, and collection.

3.  After years of river inflow and evaporation, the salt content of the lake water built up to the present levels. The same process made the seas salty. Rivers carry dissolved salts to the ocean. Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in the ocean.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation: