Question

hip hop became more popular.
its influence on other types of music grew.
if as though ← joining words
revise your work. which joining work helps show the timing of events?
hip hop became more popular, its influence on other types of music grew.

Explanation:

We need a joining word that shows the timing of events. "As" can mean "while" or "during the time when", indicating that the two events (hip - hop becoming more popular and its influence growing) happened simultaneously or with a causal - timing relationship. "If" is used for conditional situations, and "though" is used for contrast or concession, so neither of them shows timing. So the correct joining word is "as".

Answer:

as