I think this would be considered drug therapy treatment. Not 100% sure though.
I would say roughing and groundnuts.
Canning, freezing, boiling are things you do to food. Oil, butter, honey are all think-dish liquids.
Agreement or concord happens when a word changes form depending on the other words to which it relates. It is an instance of inflection, and usually involves making the value of some grammatical category "agree" between varied words or parts of the sentence.
The two reasons that causes sports to be more popular is a: Funding and b: being well followed by fans