Please help me

im going crazy

Some of the things osha does you carry on a mission include developing job safety and health standards and enforcing them through work site inspections maintaining reporting and record keeping system to keep track of job related injuries and illnesses in providing blank programs to increase knowledge about occupational safety and health

Me with this i need to get the answer quickly.

In which way does nicotine cause addiction? by stimulating the brain’s pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety