Final answer:
Weightlifting is the best option for Orlando to boost his metabolism without excessive sweating, as it increases muscle mass and raises resting metabolic rate.
Step-by-step explanation:
Orlando is interested in boosting his metabolism with an exercise that does not lead to excessive sweating. Among the options provided, weightlifting is most likely to accomplish this goal. Although all forms of physical activity can boost metabolism to some extent, weightlifting has the unique advantage of increasing muscle mass, which in turn can raise resting metabolic rate. This means that even when not exercising, a person with more muscle mass may burn more calories than someone with less muscle mass. Additionally, weightlifting is typically done at a pace that does not cause excessive sweating unless the intensity or environment is specifically geared towards high levels of exertion.
Yoga is also beneficial for metabolism and overall health, but its effects on the metabolic rate are usually subtler compared to weightlifting. Dancing and running are likely to result in higher levels of sweating, as they are generally more aerobic and vigorous activities.