Barbara remarks, "the closer we get to the restaurant, the hungrier i get! " this observation corresponds to which concept?

The scenario in which Barbara remarks, "The closer we get to the restaurant, the hungrier i get!" means that this observation corresponds to the concept gradient of approach.
This concept  is a concept in Behaviorism. It describes the change in intensity or drive as an organism approaches a desired or pleasant stimulus such as food.

The correct answer is "  it was believed that the dispute emerged in 632 just after the death of the prophet muhammad."