What is the physical environment where an organism lives?

Its A Habitat//Ecosystem

An ecosystem is just all the organisms that live in a place, together with their physical environment. Habitat is the natural environment of an organism.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.