The most common cause of suicide is untreated depression<span>, as 90% of individuals who commit suicide are </span>depressed. and sometimes mental illness like <span>trauma, drug addiction, existential crises, </span>chronic pain<span>, and terminal illnesses</span>
While our parents were working, Mrs. Kent watched <u>us.</u>
they or we, wouldn't make sense when you read the sentence.
Hope this helps.