Answer: B. describe what is causing a change in the environment
Explanation:
Environmental indicators can be define as the signs shown by the biotic as well as the abiotic factors of the environment which are indicative of the changes occurring in the environment. These indicators will help in tracking the exact state of the environment. For example, the cause of ozone depletion is the increase in concentration of chlorofluorocarbons and other pollutants in the atmosphere. These are the warning signs that occur due to the hazards caused by humans and catastrophic events.
