GEOLOGY

Detailed explanation-1: -The correct answer is option 4. Contaminate means make (something) impure by exposure to or addition of a poisonous or polluting substance.

Detailed explanation-2: -Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants. Pollutants can be natural, such as volcanic ash. They can also be created by human activity, such as trash or runoff produced by factories.

Detailed explanation-3: -Some of the most common causes of chemical contamination are cleaning products or pesticides and herbicides from unwashed fruit and vegetables. Examples of chemical contaminants are: industrial chemicals. agricultural chemicals.

Detailed explanation-4: -Some common synonyms of contaminate are defile, pollute, and taint. While all these words mean “to make impure or unclean, ” contaminate implies intrusion of or contact with dirt or foulness from an outside source.

Detailed explanation-5: -The presence of any material or contamination or any act of man, which leads to pollution is termed a pollutant. The contamination of natural resources such as air, water, and soil with any material leads to pollution. A pollutant can be gasses such as sulfur dioxide, smoke, dust particles, and waste material.