Match the items in Column A to the items in Column B.

Here are the matches for Column A to Column B:

• 2.1 Dimension: D
• 2.2 Opposites: C
• 2.3 Personal space: B
• 2.4 Improvisation: A

Here is the completed matching:

• 2.1 Dimension: $\boxed{\text{D}}$
• 2.2 Opposites: $\boxed{\text{C}}$
• 2.3 Personal space: $\boxed{\text{B}}$
• 2.4 Improvisation: $\boxed{\text{A}}$