Cognitive abilities like fluent speech, enhanced planning abilities, and powerful intellectual skills are __________, which makes it extremely difficult to establish quite when anatomically modern humans acquired modern forms of human behavior.

Question

Quizplus · Accepted Answer

"Intangibles" refers to abstract concepts that cannot be physically touched, which fits with the description of cognitive abilities provided in the sentence. The other choices, "challenging," "ephemeral," and "didactic," do not accurately describe cognitive abilities or their relationship to the timing of modern human behavior.

Cognitive Abilities Like Fluent Speech, Enhanced Planning Abilities, and Powerful