If a person consumes 2,400 kcal/day and expends 2,600 kcal/day, what is the short-term expected direction of body weight change and why?

Weight is expected to increase because intake is sufficient and the body will store all excess nutrients even when expending more energy.

Weight is expected to decrease because energy expenditure exceeds intake producing a caloric deficit.

Weight will unpredictably swing between gain and loss because energy balance does not reliably predict short-term changes.

Weight will remain unchanged because daily fluctuations always average out and the body adjusts overnight.