Are fungi friends or foes?

They can be both and neither. Fungoid infections of, for example, your foot aren't exactly pleasant whereas grilled mushrooms are delicious. Lots of other fungi are neither harmful nor useful to people. Identifying examples of harmful, useful and other fungi might help.

You've been assigned a somewhat silly question.

Both there are good fungi which can be eaten eg mushrooms. Yeast is a wellknown example of friendly fungus. There are pathogenic fungi which cause disease in plants and animals, they can be called as foe.

I should consider fungi as friend.

They are essential for transformation of material. Dead plants and animals decay mainly due to fungal and bacterial attack. without this mineralization and mobilization of elements in biogeochemical cycles will not be possible.

Both. Either.

Friend:

cheese

yoghourt

wine

beer

bread

mushrooms (yum)

Foe:

ringworm

mouldy stuff growing on your food

damage to plant crops