how come sketch is a negative word?

maybe I express myself badly. My bet.

Negative in the sense that we need a word that shows a proactive action in the entire meaning of the sentence.
Interrogate is the right word.

Sketch means drawing indeed. But this word does not say anything about a proactive approach to explain the mentioned four elements.

regards

Is it A or B ?

Answer: The correct word is "consider." In this phrasing, the four elements can be studied or set apart for individual attention, and "consider" fits the sense of examining or evaluating them separately.

Explanation
- The sentence suggests isolating each element to examine its role: technique, observation, imagination, philosophy. The verb should convey purposeful thought about each element.
- "Interrogate" implies questioning, which is stronger than needed here.
- "Neglect" and "berate" would be counterproductive.
- "Sketch" is a possible action but doesn't align with the idea of evaluating or separating the elements for examination.
- "Consider" best preserves the formal, analytic tone of the statement.