Water Cycle Which of these best describes what is happening at arrow 1 in the water cycle?
A Water vapor is collecting to form clouds.
B Water falling as rain is changing into clouds.
Water is flowing into the ocean.
D Water heated by the sun is changing to water vapor.

Water heated by the sun is changing to water vapor.

D

Explanation:

It is one state of water within the hydrosphere. ... Water vapor is transparent, like most constituents of the atmosphere. Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation.Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.