Hey :)
Nutrition is one of the 7 characteristics of living things, part of MRS GREN (Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition)
Nutrition is when organisms take substances from their environment and use them to provide energy or materials to make new cells
It is the taking in of materials for energy, growth and development
Plants require light, carbon dioxide, water and ions; animals need organic compounds and ions usually need water
I got this from my bio book :)
Hope it helps!