(A) irregular motions of small particles suspended in a fluid
(B) convection currents in a liquid or gas
(C) convection currents in a gas but not in a liquid
(D) the stretching of a body beyond its elastic limit
(E) the sinking of mercury in capillary tubes
The answer is: (A) irregular motions of small particles suspended in a fluid
The term Brownian movement refers to irregular motions of small particles suspended in a fluid.