Question

then a young, developing star becomes hot enough and dense enough, the process of ------ begins. options (from image): he->c->o fusion, fission, he->c fusion, h->he fusion

Explanation:

The question is about the process that begins when a young, developing star becomes hot and dense enough. In stellar evolution, the first fusion process that occurs in a star (like our Sun) is the fusion of hydrogen (H) into helium (He). Fission is the splitting of atoms (not relevant for star ignition), He->C fusion happens later in a star's life when it has exhausted hydrogen, and He->C->O fusion is even later. So the correct process is H->He fusion.

Answer:

The correct option is the one labeled "H->He fusion" (the teal - colored card with "H->He fusion" text).