What is well-tested explanation that brings together many observations in science would include such things as evolution, plate tectonics and biogenesis?

The correct answer is a theory.  

A theory is a rational and contemplative kind of generalizing or abstract thinking or the outcomes of such thinking. On the basis of the context, the outcomes might involve generalized illustrations of how nature functions.  

A theory can be a source of knowledge that may or may not is related to the specific explanatory models. To theorize is to create the body of knowledge.  

b. regulated is the actual answer to your question.

explanation:

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: