Answer: 3 covalent bonds
Step-by-step explanation:
Covalent bond is formed by equal sharing of bonded Electrons.
Generally covalent bond is formed between non metals. In our example, NH3 ,both N and H are non metals.
In NH3, nitrogen is Central atom and it is surrounded by 3 He.
Each hydrogen is attached to nitrogen by covalent bonds.
Hence no of covalent bonds:3