The best way to write the underlined verb in the sentence that contains plural noun phrase storm trackers is; Map
The subject of the sentence is the plural noun phrase storm trackers and it means that the verb also has to be plural, and maps and is mapping are both singular instead of plural like map and are mapping.
However, for us to keep parallelism in the sentence, the second verb should have the same tense as the first verb. The first verb in the sentence is track, which is present simple, which means that the second verb should also be present simple map.
Read more about Verbs at; https://brainly.com/question/14584990
