The human body's systems are interrelated. In other words: They depend on each other.
They are separate from one another.
Their relationships are difficult to understand.
They do not interact with one another.

132

explanation:

12

d i think its   answer d

answer;

-chlorine

explanation;

-toxic industrial chemicals are industrial chemicals that are manufactured, stored, transported, and used throughout the world. toxic industrial chemicals can be in the gas, liquid, or solid state.

-they can be chemical hazards (e.g., carcinogens, reproductive hazards, corrosives, or agents that affect the lungs or blood) or physical hazards (e.g., flammable, combustible, explosive, or reactive).