Answer:
Cl
Step-by-step explanation:
In a covalent bond between Cl and H, (Cl) tends to attract electron density from the other element in the bond.
Chlorine is more electronegative than hydrogen. In general, elements towards the top-right of the periodic table are more electronegative. This is because these elements are desperate for a few more electrons to fill their outermost shell (and have a full octet). The more electronegative an element is, the more it wants electrons. As a result, highly electronegative atoms have a greater pull on the electrons in a covalent bond.