Final answer:
The correct representation of a single covalent bond between two hydrogen atoms is c) H-H, showing the shared electron pair with a dash.
Step-by-step explanation:
The question is asking to identify the representation of a single covalent bond between atoms. An appropriate way to represent a single covalent bond in chemical structures is by using a dash (-) between the symbols of the involved atoms. Therefore, the correct answer to the question 'Which shows a way to represent a single covalent bond between atoms?' is c) H-H. The hydrogen molecule (H2) is a classic example of a single covalent bond where two hydrogen atoms share a pair of electrons, which can also be depicted as H:H with two dots representing the shared electron pair.