The insects in the photograph are demonstrating _________communication. 
Definitions:
Concentration Gradient
A concentration gradient is a variation in the concentration of a substance across a space or a membrane, leading to the movement of particles from an area of higher concentration to an area of lower concentration.
Expend Energy
The act of using biological or mechanical power for physical activities, processes, or to accomplish tasks.
Cell
The basic structural and functional unit of life, which consists of living material enclosed by a membrane.
Acetyl CoA
A molecule that plays a central role in metabolism, linking the glycolysis and citric acid cycle pathways.
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