What kind of engine do most cars use today? a. external combustion engine b. electric engine c. biomass engine d. internal combustion engine

Internal Combustion Engine

Explanation:

Most of the engine of the cars are based upon the principle of Internal combustion engine.

In this type of engines the fuel is mixed with air in definite proportion and then  it is fired with the help of spark inside the engine. Due to this spark large heat is released due to combustion of air fuel mixture.

This thermal energy is used to drive the all components of car. So here since the energy is released inside the engine due to combustion of air and fuel mixture inside the engine so it is known as Internal Combustion Engine.

the answer to this is proletariats.

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