Question

what does effect mean here?
politicians disagree on the effect of immigration on the economy.
effect noun an image or a sound that is created to imitate something real
effect noun a change that results from a cause

Explanation:

In the sentence "Politicians disagree on the effect of immigration on the economy", we need to find the correct meaning of "effect". The first option refers to a simulated image/sound, which doesn't fit. The second option, "a change that results from a cause", fits because immigration (the cause) has an impact (change) on the economy.

Answer:

effect noun a change that results from a cause