Living things undergo many life processes. There are seven things that they need to do to count as being alive. The phrase MRS GREN is a way to remember them:
Movement - all living things move, even plants
Respiration - getting energy from food
Sensitivity - detecting changes in the surroundings
Growth - all living things grow
Reproduction - making more living things of the same type
Excretion - getting rid of waste
Nutrition - taking in and using foodSo, what you need to do is to remember MRS GREN!