Answer:The four main components of physical fitness are cardiovascular endurance, muscular strength, muscular endurance, and flexibility. Each one is important because they work together to keep our bodies healthy and strong.1. Cardiovascular Endurance – This is the ability of your heart and lungs to work efficiently during exercise. It’s important because it helps you do physical activities longer without getting tired quickly, and it also supports heart health.2. Muscular Strength – This is the amount of force your muscles can produce. It’s important because it helps you lift, push, or carry things in everyday life, and it also supports strong bones and better posture.3. Muscular Endurance – This is how long your muscles can work without getting tired. It’s important because it lets you do repeated movements like climbing stairs or doing sports without stopping quickly.4. Flexibility – This is how easily your joints can move through their full range of motion. It’s important because it helps prevent injuries, improves posture, and allows you to move more freely and comfortably.Having a good balance of all four makes your body more fit overall and helps you stay active and healthy for a long time.