Concept:The blank requires a word that captures a negative outcome of misusing social media.
Explanation:The passage contrasts social media as a tool for growth against a harmful effect.
The sentence says technology should not be a source of something negative.
“Stress” means mental or emotional strain, which matches the earlier mention of pressure and anxiety.
Option A (fun) is positive and does not fit.
Option B (distraction) is less precise and weaker than “stress” in this context.
Option D (failure) refers to lack of success, not emotional harm.
Therefore, “stress” is the most appropriate choice.
Answer:Option C (stress)