Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.
Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors. (A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors (B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors (C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do (D) and merges the nuclei of atoms but does not split them apart, as is done in unclear reactors (E) and merges the nuclei of atoms, unlike atomic reactors that split them apart
Actually, in this question, "merging the nuclei of atoms..." has to modify the action "powers the Sun...", and it describes how the action "powers blah blah" is done.
Actually, in this question, "merging the nuclei of atoms..." has to modify the action "powers the Sun...", and it describes how the action "powers blah blah" is done.