Question

read the passage.most adult human bodies are made up of 206 bones. these bones come in many different shapes and sizes. for example, the femur is a long bone found in the leg. it has a rounded bump at the top, where it meets the hip, which helps the leg move smoothly in different directions. ribs are thin bones in the chest. they protect important organs like the lungs. the u-shaped jawbone is thicker in the back and thinner in the front. this shape helps humans chew a mix of different foods. although our bones might seem oddly shaped, each one serves an important purpose.based on the passage, why does the femur have a bump at the top?it helps humans grind up tough foods.it helps the bone move more freely.it helps to protect important organs.it helps to keep the hip bone in place.

Explanation:

The passage states the femur's top bump helps the leg move smoothly in different directions, which matches the option about freer movement. Other options relate to jawbone (grinding food), ribs (organ protection), and are not stated for the femur.

Answer:

It helps the bone move more freely.