All living things share six key characteristics: 1) they are made of cells, 2) need energy, 3) grow and develop, 4) respond to their environment, 5) reproduce, and 6) have adaptations that allow them to survive in their environment. The document discusses each of these characteristics in more detail, explaining that cells are the basic unit of life, organisms get energy from nutrients and their environment, they grow over time and develop in response to stimuli, reproduce to continue their species, and evolve adaptations suited to their habitat.