An injury to which region would interfere with the sleep-wake cycle?

Hypothalamus

Explanation:

The hypothalamus works to maintain homeostasis, that is, the chemical balance of the body. Despite its size, it is of great importance for the normal functioning of most of the body's systems. Its operation is similar to a thermostat. When any chemical element or substance is at high or dangerously low levels, based on the metabolic functioning of each individual, the hypothalamus seeks to alert the system that it is necessary to reduce that substance or activity in the body.

The hypothalamus is the main regulator of the sleep-wake cycle, in this case, if the hypothalamus were injured, the individual would have problems maintaining the balance between sleep-wake cycle.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.