Final answer:
The Substance-Free PSA aims to raise awareness about the harms of substance abuse, even though educational efforts alone have limited success in getting smokers to quit.
Step-by-step explanation:
The purpose of the Substance-Free Lifestyle Project, specifically the Substance-Free PSA (Public Service Announcement), is a) to create awareness about substance abuse. Public Service Announcements on this topic are designed to inform the public about the dangers and consequences of substance use, such as tobacco smoking. Moreover, research underlines that while educational programs have a minimal effect on persuading smokers to quit, since most are aware of the risks, the continuous promotion of substance-free messages may still play a vital role in prevention and awareness campaigns.