Drag the elements below into the order they are formed in a star, from first for newly formed stars to last for old stars.

Oxygen, Helium, Carbon, Hydrogen.

Hydrogen, Helium, Carbon, Oxygen.

The correct order of elements as they are formed in a star, from first for newly formed stars to last for old stars, is:

1. Hydrogen
2. Helium
3. Carbon
4. Oxygen

To determine the order in which elements are formed in a star, we need to understand the process of stellar nucleosynthesis. Here's how to figure out the correct order:

1. Hydrogen (H): Stars are mainly composed of hydrogen. The fusion of hydrogen atoms in the star's core is what provides the energy that makes stars shine.

2. Helium (He): As hydrogen atoms undergo fusion, they combine to form helium. This fusion process releases a tremendous amount of energy, which is why stars shine so brightly.

3. Carbon (C): After a star exhausts its hydrogen fuel, it begins to fuse helium into carbon through a series of nuclear reactions. These reactions occur in the core of the star, where the pressure and temperature are extremely high.

4. Oxygen (O): As the star evolves further, it can continue to fuse carbon and helium to produce heavier elements such as oxygen. This occurs in the later stages of stellar evolution, particularly in more massive stars.

So, the correct order in which elements are formed in a star, from first to last, is:

1. Hydrogen (H)
2. Helium (He)
3. Carbon (C)
4. Oxygen (O)

Now you can drag the elements into this order accordingly.