one of the fundamental concepts underlying communication styles theory is that select one: a. an individual's communication style tends to be stable throughout his/her life. b. communication styles are determined solely by heredity. c. people are different from day to day and therefore their styles change day to day. d. communication styles are entirely a learned behavior.

a. an individual's communication style tends to be stable throughout his/her life

Explanation:

The four basic types of communication are passive, aggressive, passive-aggressive and manipulative, assertive. All these tend to be based on the observed and learned based on the external environment.  In an aggressive and passive style, the users appear passive over the surface and they tend to be feeling powerless or stuck, In an assertive style the features of an open communication link which is not overbearing. The passive style the person usually fails to express their feelings or needs. The manipulative style includes the influencing or controlling others for their advantage.

The activity of providing goods and services involving financial and commercial and industrial aspects.

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