Which of the following abilities constitute intelligence?

All of the listed abilities constitute intelligence. Here is a brief explanation of how each one relates to intelligence:

1. Communication: The ability to convey information effectively and understand others is a crucial aspect of intelligence, as it facilitates learning and cooperation.
2. Decision Making: Making informed choices based on available information and potential outcomes demonstrates cognitive processing and rational thought, both key components of intelligence.
3. Problem Solving: The capacity to identify solutions to complex issues involves critical thinking and creativity, which are core aspects of intelligence.
4. Logical Reasoning: The ability to think logically and make sense of relationships between concepts reflects an individual’s cognitive abilities and intellectual capacity.
5. Understanding: Comprehending concepts, ideas, and situations is a fundamental aspect of intelligence, as it underpins learning and adaptation.

Thus, all these abilities are integral to what is commonly understood as intelligence.