What happens to the level of alcohol in the bloodstream as alcohol consumption decreases?

When alcohol consumption decreases, the level of alcohol in the bloodstream falls. This occurs because the body metabolizes alcohol over time, and with reduced intake, there is less alcohol being introduced into the system. The liver plays a crucial role in processing and breaking down alcohol, and as it continues to metabolize the alcohol that is already present, the concentration in the bloodstream gradually declines. Consequently, a decrease in alcohol consumption directly leads to a decrease in blood alcohol levels, which is why this choice is the correct one.