Three levels of (BLANK) help human services organizations to achieve goals they develop for their clients. Explain which type of direct-services intervention would be the most effective in the following scenario.

Situation: Scott has struggled since losing both of his parents to cancer. He is on his own, living in a small, two-room bachelor apartment. His depression has caused him to get back in touch with the wrong crowd, and his drinking and drug use have increased. He feels as if his life is spiraling out of control, but he feels helpless to stop it on his own.