Could someone give me an example for this? i am very confused.
write down on example each for mutualism, commensalism, and parasitism from your own household. your examples must represent relationships within your family unit. (ie: you and your parents, you and a sibling etc).

Basically mutualism, commensalism, and parasitism are forms of symbiosis. (the way animals interact with each other, usually referring to eating) 

i don't think this can be associated with households, but an example might be: 

mutualism - you need a MP3 player from your sister, but she needs you to do the dishes, etc... 
commensalism- idk, maybe your grandma gives you free advice? 
parasitism- you take money from your parents-lol.

The awnser is b i believe