The ability to understand complex ideas, to adapt effectively to the environment, to engage in various forms of reasoning, and to overcome obstacles by taking thought is called

Intelligence

Explanation:

 According to the question, the intelligence is refers to the ability for understanding the various types of complex problems or ideas, problem solving ability and also easily retain the knowledge.

The intelligence is one of the concept that helps in measuring the IQ test of the individual person and also knowledge in the specific domain.

By using the intelligence ability we can effectively solve various types of reasoning and also overcome all the obstacles in the environment. The intelligence includes all the following skills that are

Therefore, Intelligence is the correct answer.

the correct answer on edgen is:

(c.) prevent the spread of communism.

i just took the test.