Final answer:
The easiest part of the warm-up is likely stretching exercises as they are low-intensity movements that help increase flexibility and range of motion.
Step-by-step explanation:
Based on the given information, the easiest part of the warm-up would likely be stretching exercises. Stretching exercises are usually low-intensity movements that help to increase flexibility and range of motion. They can be performed at a comfortable pace and are less physically demanding compared to cardiovascular activities or the scheduled activity itself. Additionally, stretching exercises are important for preventing muscle injuries and increasing muscle endurance.