Which of the following features of human language enables humans to talk about things which are not present in immediate time and space?

Correct Option: Displacement.

Explanation:
Human language possesses several unique design features that distinguish it from animal communication systems. The feature referred to in the question is defined as follows:

• Displacement: This is the property of human language that allows language users to communicate about things, events, ideas, or entities that are not present in the immediate spatial or temporal environment. In other words, displacement enables humans to talk about the past, the future, distant places, hypothetical situations, and imaginary concepts.

Let's brief the other options for clarity:
• Structure Dependence: Refers to the fact that language operations (like forming questions or passive sentences) depend on structural relationships between words in a sentence rather than simple linear order.
• Discreteness: Refers to the property where linguistic signals are made up of distinct, individual units (such as phonemes or words) rather than a continuous scale.
• Arbitrariness: Refers to the absence of a natural or direct connection between a linguistic sign (a word) and its meaning (the concept it represents).

Therefore, the feature that specifically allows talking about things removed in time and space is Displacement.