Is nymph consumer or producer

No it is a under water fly that hasn't hatched yet. No, nymphs are simply insects in an early stage. The dragonfly nymph, for example starts out as an egg, then "mutates" into a nymph, which has to eat to grow. If you are still confused, think of it as this, caterpillars are nymphs, which eat and eat, but never give.

Producers are plants because they produce food.