Question

kryptonite, matter from supermans home planet, is the only thing that can reduce the superheros strength. what is the meaning of the allusion in the sentence below? happy love songs are kryptonite to my otherwise stoic father. a source of displeasure a source of weakness

Explanation:

Kryptonite is known as the substance that weakens Superman. In the sentence "Happy love songs are Kryptonite to my otherwise - stoic father", it implies that happy love songs have a weakening effect on the father's stoic nature. So the allusion refers to a source of weakness.

Answer:

a source of weakness