Wesley should consult an online dictionary to find out how to pronounce the word "phylum".
To find out the correct pronunciation of the word "phylum," Wesley should consult an online dictionary. Online dictionaries provide not only the definitions of words but also audio pronunciations. Wesley can enter the word "phylum" into a reputable online dictionary search bar, and the dictionary will provide the correct pronunciation in either written or audio format. This will ensure that Wesley pronounces the word accurately during his science presentation.