Ready For IELTS Cb P. 32 Lf 1 Ex. 6

Explanation
The correct answer is "more dangerous" because extreme sports like sky-diving involve higher levels of risk and potential harm compared to hiking. Sky-diving typically involves jumping out of an aircraft at high altitudes and free-falling before deploying a parachute, which requires specialized training and equipment. On the other hand, hiking is a recreational activity that involves walking in natural environments, generally on established trails, and does not typically involve the same level of risk or potential danger as sky-diving.

Explanation
The word "fitter" in this context refers to being in better physical condition. The explanation for the correct answer is that cycling requires more physical effort and engages more muscle groups compared to walking. When cycling, you need to pedal, maintain balance, and use your core and upper body for stability. This results in a higher cardiovascular workout and helps build strength and endurance. Walking, on the other hand, is a less intense form of exercise that primarily targets the lower body. Therefore, to engage in cycling, it is necessary to be in better physical condition or "fitter" compared to walking.