To prevent drowning, always swim alone true or false

False

Explanation:

Drowning results from inability or hindrance to your ability of swimming whether in a recreational setting or in professional setting or in emergency situations. Therefore, swimming alone is dangerous because if you start drowning, no one in your close vicinity can help you because there's one to hear your cries for help.

A rule fo thumb is to always swim with someone or near a crowd so you can call for help if needed. Especially true, if you are swimming in a beach or ocean because rip tides can pull you towards ocean and drown you if unable to escape, so ALWAYS have company.