Habitat - An environment in which an organism is normally found.
Population - All the individuals of the same species in a habitat is called a population.
Community - All the populations in a habitat make up the community.
Ecosystem - This is the interaction of a community with non-living factors of the environmnent.
M EASURE (WHAT?)
M EASURE (HOW?)
S AME (WHAT?)
S AME (HOW?)