Question

1. what kind of engine do most cars use today?

○ biomass engine
○ external combustion engine
○ internal combustion engine
○ electric engine

Explanation:

To determine the engine most cars use today, we analyze each option:

• Biomass engines are not common in most cars currently.
• External combustion engines (like steam engines) are not used in most modern cars.
• Internal combustion engines (e.g., gasoline or diesel engines) have been the dominant type in most cars for a long time, though electric engines are growing in popularity, most cars still use internal combustion engines currently.
• Electric engines are becoming more common but are not yet the majority for most cars today.

Answer:

C. internal combustion engine