Which car components are likely to explode when cut or exposed to high heat?

The correct choice identifies components that contain gas and could potentially explode when cut or subjected to high heat. Gas shocks, or gas-charged shock absorbers, operate under pressure and contain gases that can expand rapidly when heated or punctured, causing an explosion risk. Seatbelt pretensioners are another critical component, as they use small explosive charges to retract seatbelts quickly in the event of a collision. When tampered with or exposed to excessive heat, they can also pose an explosion hazard due to their design and the materials they contain.

Choosing an answer that includes brake lines and fuel injectors, while these components can also present hazards, does not align with the question's focus on components that are especially prone to explosion upon cutting or high heat exposure. Engine components and gas tanks do contain fuel and operate under high pressures, but the likelihood of an explosion during these specific scenarios isn't as direct as with the identified components in the correct answer. Thus, the focus on gas shocks and seatbelt pretensioners underscores the unique risk they carry in the context of vehicle rescue situations.