The correct answer is variable
Explanation: Variable is, conventionally, a representative element of the set of all possible results of a phenomenon. A variable can be classified into two types: Quantitative: its values are given in numbers.
Answer:
The theory that would best explain his willingness to always wash and clean his car before going out is A. Thorndike's law of effect.
Explanation:
According to Edward Thorndike's law of effect, if a response in a situation is followed by satisfaction, it becomes more likely to happen recurrently in that same situation. In the situation of going out, Blake once - or more times - washed his car and noticed more friends wanted to ride with him. That fact probably caused satisfaction, happiness. Wanting to feel it again, Blake is more likely to wash his car every time he decides to go out.
Camels can carry water in their hump things, and ships do sail on water, so maybe it's referring that the camel can also easily transport you.