Q--Can spiders help eggplant farmers control parasites?
A--My step-by-step reasoning: The potato tuber moth is a parasite that targets the plant family Solanaceae, including eggplant. Selenops radiatus is a spider genus in South Africa that effectively controls the potato tuber moth.
So, the answer is yes.

Q--Is it foolish to stand on giraffe's head to see over Eiffel Tower?
A--My step-by-step reasoning: The neck of a giraffe can be up to 7 feet in length. Including their necks, giraffes can be as tall as 20 feet. The Eiffel Tower is 1,063 feet tall.
So, the answer is yes.

Q--Would a kaffir lime be a good ingredient for making a candle?
A--My step-by-step reasoning: Kaffir limes are citrus fruits originating in tropical climates. The Kaffir lime leaves and rind emit an intense citrus fragrance when crushed up. Yankee Candle, one of the largest candle companies, sells several popular varieties of citrus candles. Sage and Citrus is one of the highest rated scents that Yankee Candle sells.
So, the answer is yes.

Q--Should spaghetti be slick when cooked?
A--
My step-by-step reasoning: Spaghetti is typically served with a sauce on it. When noodles have too smooth a texture, no sauce will stick to them.
So, the answer is no.