That would be A. Photosynthesis.
Some examples of skills used in science include Observation and Measurement. Observational Skills and Measurement Skills.
Answer: Classified as a theory.
Explanation: The dictionary definition of theory is a system of ideas that are used to logically explain something. It also says that they are also based off of something not entirely connected to the thing the theory is being made about.
Because the idea that the universe has expanded explains such a large number of observations, which in turn leads to more predictions and therefore more observations that support it, this becomes your system of ideas. Because this system was based off of the aforementioned observations in the first paragraph, this proves that it is best classified as a theory.
Answer;
-Francis Galton
Explanation;
-This phrase was popularized by Francis Galton in discussion of the influences on social development. The two to first bring the argument to light may have been Locke and Rene Descartes, when Locke proposed that people are born without any innate ideas.
-The nature vs. nurture hypothesis is a scientific, cultural, and philosophical debate about whether human culture, behavior, and personality are caused primarily by nature or nurture.
A is the most sensible answer