Charles Darwin suggested that, before our ancestors communicated in words, they used facial expressions to communicate threats, greetings, and submission, which had survival value.
Answer: Option D
Step-by-step 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.