Answer:
Predation
The owl is the predator, and eating the mouse which is its prey.
Answer:
Lipids within the sebum react with air, resulting in chemical oxidation and the formation of the black color.
Explanation:
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Sunlight would be an answer because you are talking about the lower depths of the ocean meaning the bottom of the ocean, and the farther away you get from the surface the less sunlight
The answer is: A. collecting data
During this process , researchers would use their observational skills and record every notable occurrence that happen to the variables.
The focus on this process is simply to add all relevant data without making any analyzation. That process come later on after the researchers started to change the variables in order to see whether it would create a correlation.