Circadian rhythms are biological changes that occur on a 24 hour cycle. The correct option among all the options that are given in the question is the last option or the fourth option. This is the type of system that happens in plants, animals, cyanobacteria and fungi. I hope the answer comes to your help.
Pain or discomfort in the stomach associated with difficulty in digesting food is called indigestion.
Answer:
Physical Barriers. Physical barriers in the workplace
Perceptual Barriers. It can be hard to work out how to improve your communication skills
Emotional Barriers.
Cultural Barriers.
Language Barriers.
Gender Barriers.
Interpersonal Barriers
Withdrawal.