What are some factors that could affect the number of organisms in an ecosystem? And write it like a 7 grader

Answer 1

There are a lot of things that can affect how many living things there are in an ecosystem. For example, if there's not enough food for all the organisms, some might die or leave. If there's a disease going around, that could also make the number of organisms go down. Another thing that can hurt the population of living things is when humans come in and change the land by building things or polluting. All of these things can mess with the balance of an ecosystem and make it harder for organisms to survive.