C seems like the correct answer
In an ecosystem, two factors are being classified which are the abiotic and the biotic factors. Both of these factors play an important role in order to balance the ecosystem and maintain the harmony of the living things therein. The environment includes the abiotic factors which are the sunlight, weather, water, air, and all other factors which are not living but contribute to the growth and development of the living ones. For example, plants cannot live without water, sunlight and carbon dioxide. The effects that humans have on the environment is both good and bad. Humans also play an important role in maintaining the environment, and they also have the capability to endanger it.
The term is called a theory.
In scientific investigation, a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.
Answer: Option D
Explanation:
Tuberculosis is usually treated by the end of six months or early. This is done by the first line TB drugs.
This disease is resistant to many of the antibiotics which is used by in case of Tuberculosis. These drugs were initially used to treat tuberculosis.
There are chances that this disease is not cured completely and is repeated again and again if the patient is not handled carefully.
The illness is very risky as it leads to coughing along with the blood clots and many more symptoms.
