His … to violent video games is something to worry about.

Analyze the question: We need the word that best fits "His ..... to violent video games is something to worry about." The phrase "something to worry about" tells us the sentence describes a negative or unhealthy habit.

Explain the concept: This is a vocabulary-in-context question. Words can have similar meanings but different connotations (positive, neutral, or negative). Always use clues in the sentence to match the tone.

Examine each option:

• A. devotion has a positive tone. It suggests loyalty or dedication, as in "devotion to God" or "devotion to duty." It doesn't fit something worrying.
• B. attachment means an emotional bond or fondness. It is fairly neutral and is usually followed by "to." It is less strong and doesn't carry the sense of harmful excess. (Note the correct spelling is "attachment.")
• C. commitment means dedication to a cause or responsibility. It is usually positive, so it doesn't suit "violent video games" being a worry.
• D. addiction means a compulsive, unhealthy dependence on something. It is followed by "to" (addiction to drugs, addiction to games) and naturally pairs with "something to worry about."

Solution: Putting the best option in: "His addiction to violent video games is something to worry about."

This is the only option that clearly conveys a harmful, uncontrollable habit, which matches the worry expressed in the sentence.

Tip: When a sentence expresses concern or worry (such as "something to worry about" or "a serious problem"), look for the word with a negative connotation. Also, memorize common collocations: addiction to, devotion to, commitment to, attachment to. Then let the tone of the sentence decide.