Research on the communication skills of nonhuman primates reveals their inability to refer to objects that are not immediately present in their environment, such as food and danger. The ability to describe things and events that are not present is called__.

A. cultural transmission.
B. displacement.
C. linguistic imagination.
D. phonology.
E. productivity.

answer; i believe its called ; checks   and balances;

c. taught scientists many new things about the earth, but not other planets.

explanation:

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

what are the options?