Increased susceptibility to infectious diseases are caused mostly by O a. Tobacco
Ob. Optimism bias
Oc. Smoking
O d. Flu
Oe. Poverty

i would think a oil tanker that has leaked in a bay

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).