“What can cause a child to be aggressive?”

Children will copy everything around them behavior , personalities of their environment. Children can also be aggressive when they do not feel understood and fight for attention.
It is very important to checkin first with the child who’s angry and ask if they are ok? Then repeat back what you understood and then point the way to an alternative outlook to change behavior. We need to understand the underling cause of this behavior bottom line.

Lack of discipline

There is no single answer to adolescent aggression or treatment for aggression. The key is to communicate with your child in a non-confrontational and non-judgmental manner to find out what is occurring in their mind. Your child may be struggling in school, being bullied, coping with depression, or even being abused by someone in the community. When your child becomes aggressive, try to ask what they need instead of scolding them. Once they feel that you do not understand, they are much less likely to open up and tell you the truth. Try to help your child co-regulate and continue to keep open communication. If your child is not willing to talk to you, bring them to a trained professional, such as a therapist or ask the school counselor to check in on them.

Greetings,

There are many factors that can be considered. Your environment, stress, the stage of development, losing self-esteem, frustrations, testing their limits, etc., can be a factor in your daughter's aggressive behavior. I hope this helps.