You are preparing a contribution for the school magazine about the growing concern of "Smartphone Addiction." The editor asks for a short composition (~200 words) and related brief tasks to help readers understand causes, effects, and practical remedies.

a. Write a composition on "Smartphone Addiction" in about 200 words.

b. List four positive uses of smartphones that remain valuable despite the addiction problem.

c. Suggest four practical measures students can adopt to reduce smartphone addiction.

d. Write a concise 20-word summary of the composition.