Well all these signs indicate that the person is having a panic attack,which is an indicator of anxiety disorder
The flow of energy through a food chain and is the focus of study in ecological energetics In an ecosystem ecologists seek to quantify the relative importance of different component species and feeding relationships
Ecosystems mostly consist of both - abiotic and biotic factors. For that reason the answer which would properly address your question would be A - biotic and abiotic factors. Biotic factors are considered to represent the part of nature that are living and affect other organisms while abiotic factors are things which do not affect other living compounds.
