The story aims to promote the beauty of African and its people. It describes the traveling experience that they had while crossing the desert, helping readers to understand how it is to walk through the desert for the people. It might be challenging and dangerous, but also beautiful and unforgettable.
Here we can observe that the verb used doesn't reflect the correct tense to express when this action took/is taking/will take place. There are many tenses where you could choose from, depending of the time of action:
The simplest example we could make is if this action is a routine that happens continuously, the action verb (invite) is changed to simple present for the third person of singular (invites):
<span>Tommy, in an effort to maintain clowning's positive roots, invites dancers to weekly performance battles.</span>