This document discusses living things, specifically plants. It explains that plants absorb water, minerals and carbon dioxide, and use photosynthesis and sunlight to produce carbohydrates. All living things are made of cells and have three vital functions: nutrition, interaction, and reproduction. The simplest living things are single-celled organisms, while more complex organisms have cells that group together to form tissues, organs, and systems. Plants are multicellular organisms that can produce their own food through photosynthesis, do not move but can react to their environment, and most reproduce using flowers and seeds.