Question

which is the third step in the fusion process?

Explanation:

In the proton - proton chain fusion process in stars, the first step is two protons fusing to form a deuteron along with a positron and a neutrino. The second step involves a deuteron combining with a proton to form helium - 3. The third step is two helium - 3 nuclei fusing to form helium - 4 and two protons. The second image shows two helium - 3 nuclei fusing to produce helium - 4 and other particles.

Answer:

The image with helium - 3 fusing to form helium - 4.