Question

how does abstinence from harmful substances benefit a persons physical health?
they can avoid an unintended pregnancy.
they will have more time for studying or work.
they will have less risk of having an accident.
they will not worry about getting an std.

Explanation:

Harmful substances (like alcohol, drugs) can impair judgment, coordination, and reaction time. Abstaining reduces accident - causing impairments. Option A (unintended pregnancy) is related to sexual abstinence, not substance abstinence. Option B (more study/work time) is a lifestyle benefit, not physical health. Option D (STD) is related to sexual abstinence.

Answer:

C. They will have less risk of having an accident.