Cells in every part of an earthworm's body need oxygen. Which TWO statements explain how an earthworm's organ systems help provide its cells with oxygen? A. The nervous system removes oxygen from the body
B the circulatory system carries oxygen to different parts of the body.
C the respite system brings oxygen into the body
D the digestive system delivers oxygen to the blood.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.