you need the hyphen only if the two words are functioning together as an adjective before the the noun they're describing.
Answer:
Students are feeling the effects of Jaylen's anti-bullying campaign.
Answer:
D. cos its different format, hence it can test different audience
Explanation:
The answer would be the last one : “if we allow unlimited screen time, what next? students skipping school altogether?”.
Metaphor, memory is being compared to a painting
