Marcella is writing a research paper for a psychology class that summarizes the various theories that explain the relatively stable thoughts, feelings, and behaviors that individuals have. Marcella’s research paper is on:.

personality theories

Explanation:

Marcella is writing a research paper for a psychology class that summarizes the various theories that explain the relatively stable thoughts, feelings, and behaviors that individuals have. Marcella’s research paper is on personality theories. Personality theories are concerned with explaining how personalities are formed and behaviours, thought patterns are components of a personality. Thus, since Marcella is concerned with explaining  the relatively stable thoughts, feelings, and behaviors that individuals have in his research, he is most likely researching on personality theories.

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