What is it called when an organism signals another that their interaction is not serious or threatening? cooperation metacommunication agonistic interaction courtship?

The answer is metacommunication. Utilizes cues that are interpreted by the individuals of a population into useful information.  Kinesics, referring to body motion communication, is also a part of metacommunication. It also applied to humans where posture, gesture, stance, and movement are also interpreted as cues  in communication.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.