Which of the following statements is true?

• Environment includes biotic or non-living elements (air, water, rocks etc.) and abiotic components or living components (birds, animals, plants etc.)
• Environment includes all those conditions, resources or elements of surroundings that influence human life.
• Environment refers to the study of inter-relationship between the biotic and abiotic components of the environment.

2 and 3

Environment includes all the biotic and abiotic factors that influence each other. Abiotic elements include non-living elements whereas, biotic elements include all the living components.