Organisms change over time and adapt in order to survive. this statement reflects the theory of
a.) evolution
b.) photosynthesis

While the above definition describes evolution, photosynthesis is the process organisms use synthesize food: primarily using three variables in the process: sunlight (energy), water, and carbon dioxide (CO2).

Edit: More specifically, Darwin's Theory of Evolution states that organisms change in a series of natural selection.

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:

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.