Final answer:
Type I (Slow-twitch) fibers have a large number of capillaries, being highly suited for sustained aerobic activity and endurance events.
Step-by-step explanation:
The type of muscle fiber that has a large number of capillaries is the Type I (Slow-twitch) fiber. Type I fibers, also known as slow oxidative or 'red' muscle, are densely packed with capillaries and are rich in mitochondria and myoglobin, which gives the tissue its red color. These fibers are designed to carry oxygen and sustain aerobic activity for extended periods, making them suited for endurance activities such as distance running or cycling.