Topic: Fill in the Blank,

Best Answer Explained in Below-:

The sentence describes a situation where a person experiences a change in their state of awareness or alertness due to an impact. The context indicates that the individual suffered a head injury that likely affected their ability to perceive and respond to their surroundings.

The verb "lost" is the most appropriate choice in this context because it directly conveys the idea of becoming deprived of something that was previously held—in this case, consciousness. When someone "loses consciousness," it means they are no longer aware of or able to respond to their environment, often due to injury or trauma, which aligns perfectly with the scenario of hitting one's head.

In contrast, other options do not fit well with this context:

- "Failed" suggests an inability to achieve something but doesn’t imply a physical change in awareness.
- "Broke" is typically associated with physical objects rather than abstract states like consciousness.
- "Passed," though sometimes used in relation to losing consciousness (as in "passed out"), generally refers to a completion or transition rather than a direct loss.

Thus, "lost" succinctly captures the essence of the incident and clearly communicates the expected outcome after the head trauma.