Answer:
Broca's area
Step-by-step explanation:
In neurology and medicine, Broca's area is the are of the brain that is associated with the ability to produce speech. This area is located in the left side of the brain and in the frontal lobe. The main function of this area is production of speech. Most of the time, when we hit our head and our speech is affected (without our muscles of our face being affected) it is likely that the problem lies in Broca's area.
In this example, Tony fell and the left side of his head hit some concrete steps. Now, he can understand what other people are saying to him but he has a hard time speaking, in other words, the production of speech is being affected. Therefore, it is most likely that Tony suffered damage to Broca's area