Chase is a baby with a slow-to-warm-up temperament. when his parents take him to a new environment (e. g. a new friend's house), they let him have time to adjust and don't force him to interact too quickly. this match between chase's temperament and his environment is
a. nomothetic correlation.
b. goodness of fit.
c. social referencing.
d. concrete operations.

b) Goodness of fit

Explanation: In psychological terms, goodness-to-fit is described as a technique through which an individual's nature along with the characteristics in evaluated for testing compatibility in the social surrounding of that individual.

In case of child, the temperament of child and the related environment's (e.g.- family, playroom) capability is determined.Goodness-of-fir of Chase is also determined by evaluation of compatibility between personality and environment.

Other options are incorrect because social referencing is understanding of the environment by infants. Nomothetic correlation    is the basic correlation and concrete operation is the stage when child follows the rules in an unconscious manner. Thus, the correct option is option(b).