What is a person called who commits an act of violence?

Ascientist finds an organism that cannot move it has many cells produces spores and gets food from its environment in which kingdom does it belong explains

Enzo sits with a small group of friends at lunch. lately, he has been very quiet and stays home a lot even though his friends invite him to go places. he likes to play video games in his free time and is slightly overweight. which behavior is a sign that enzo may need professional mental health treatment? a) being overweight b) playing video games c) withdrawing from activities d) having a small group of friends

Why is it important for health care professional to stay informed about new development?