The tow hooks meant for towing the car from front which are below the engine bay are usually the lowest points of contact with ground during such instances. They are hard metal parts and will sustain the impact at high speeds/loads also. But this may result in the shock travelling onto the car's body and result in minor rattling issues. It is always better to have the under body checked after such impacts and get any bents/scratches to the rust coating fixed right away
Under body coating helps add a rubber type coat on the body parts...recently my jazz scraped a huge breaker in orissa & my cars silencer went kaput...repaired it after driving back 300kms with a race car like sound from an originally soundless car...so pls take breakers seriously, they are meant not only to reduce speed but also our pockets!!!