Who suggested that, before our ancestors communicated in words, they used facial expressions to communicate threats, greetings, and submission, which had survival value?
a. paul ekman
b. william james
c. james laird
d. charles darwin

Charles Darwin suggested that, before our ancestors communicated in words, they used facial expressions to communicate threats, greetings, and submission, which had survival value.

Option D

Explanation:

Charles Darwin gave the theory of evolution of emotions and in that theory, Darwin said that before the use of words were made by the humans to express their views and opinions, facial expressions wee used which could be understood by others to know what the person is trying to say.

This way of communication and expressing views evolved long back during the time of pre-mammal ancestors. The study of this evolution of communication by humans happened in the nineteenth century.

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.