Gestures, written words, and speech are all forms of a. ...

[madam-professor]

Gestures, written words, and speech are all forms of
 
  a. displacement.
  b. oral communication.
  c. documentation.
  d. media.

Question 2

Productivity refers to
 
  a. the fact that language involves coming unique units of sound according to a set of shared rules.
  b. the fact that there is no inherent or natural relationship between words and their meanings.
  c. the fact that a limited number of words may be combined into an infinite number of meaningful sentences.
  d. the ability to refer to people, places and events that are remote in time and space.

[micaelaswann]

Answer to Question 1

d

Answer to Question 2

c