The metric unit of power is .

amperes

voltage

ohms

watts

Metric unit of  power is watt

So option (D) will be the correct option

Explanation:

The metric unit of power is watt other unit of power is joule/sec

Power is also known as rate of doing work

So we can write power as , here unit of work is joule is and unit of time is sec

So unit of power is J/sec which is also known as power

As 1 joule/sec = 1 watt

From above discussion we can say that metric unit of power is watt

So option (d) will be correct option

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.