Susan tells jacob that the flour jar is in the cupboard under the sink. which among the vital functions of human language is being expressed in this situation?

a. expressing collective norms of behavior
b. interpersonal bonding
c. expressing collective expectations
d. storing and sharing collective knowledge (i think its d. not sure though)

The correct answer is- D. Storing and sharing collective knowledge.

Human language is a medium/ mode of communication among people so as to exchange their information, ideas, knowledge, and thoughts.

There can be several vital functions of human language such as -

Informational ( used to share knowledge).

Expressive ( used to express feelings and attitude).

Directive (used to influence the behavior of other person such as requesting, commanding).

Aesthetic ( to value the beauty of an object).

Phatic ( used for sociability).

As per the information in the question, Susan is sharing knowledge with Jacob by telling the location of flour jar. Therefore, in this situation, storing and sharing collective knowledge is being expressed.