The social psychologist fritz heider is historically important in the field for his contribution of
a. cross-cultural research.
b. the six universal facial expressions.
c. the covariation model.
d. attribution theory.

the first question's answer is a.

i think it is the third one.

manifest functions are the recognized and intended consequences of any social pattern, while latent functions are those unrecognized and unintended consequences. to analyze the manifest functions of any social institution, we have to study its contribution to the continuation of a group, community, or society.