Answer:
To improve the argument that the ban will be effective,the best fact to addwould be:
a fact about the impact of the drought
Step-by-step explanation:
Two reasons are backing this answer, in the first place to make aware people we need to provide arguments that are meaningful for the topic. Our topic is the droughts' impact because as a response to them Councilman Garcia proposed a strategy. Thus, we need to justify Councilman Garcia's proposal. And to let people know why they need it, we need to explain to them the impact of the drought. So they could accept it. In the second place, it is all about convincing them we have the correct point of view and we will only achieve that by providing evidence of it,