Final answer:
Mountains formed by tension leading to the tilting and dropping of sections of Earth's crust are known as fault block mountains. They are different from those created by compression, volcanic activity, or uplift.Option A is the correct answer.
Step-by-step explanation:
Mountains formed through tension where sections of the Earth's crust tilts and/or drops are known as fault block mountains. This type of mountain forms when stress on the Earth's crust stretches it.
Unlike mountains formed by compression, such as the Alps, fault block mountains arise where pieces of Earth's crust get displaced in a downward direction relative to surrounding sections, creating a block-like structure with one side often being steep and the other sloping.
Other mountain types like volcanic mountains, dome mountains, and folded mountains are created through different geological processes, such as volcanic activity, uplift, and the buckling of the Earth's layers due to tectonic plate interactions respectively.