Eight-month-old katie's parents often fight and scream, which has escalated to physical violence on multiple occasions. what effect might this environment have on her brain development?

This environment may have a negative effect on her brain development. Such environments can cause stress or fear, which impairs brain development. Also, studies have shown that these stressful environments can cause learning disabilities and delay a child’s development (National Scientific Council on the Developing Child). Harvard published a writing on this from the source mentioned, I recommend you check it out for this question. Here is the link: http://46y5eh11fhgw3ve3ytpwxt9r.wpengine.netdna-cdn.com/wp-content/uploads/2010/05/Persistent-Fear-and-Anxiety-Can-Affect-Young-Childrens-Learning-and-Development.pdf

This environment may have a negative effect on her brain development. Such environments can cause stress or fear, which impairs brain development. Also, studies have shown that these stressful environments can cause learning disabilities and delay a child’s development (National Scientific Council on the Developing Child). Harvard published a writing on this from the source mentioned, I recommend you check it out for this question. Here is the link: http://46y5eh11fhgw3ve3ytpwxt9r.wpengine.netdna-cdn.com/wp-content/uploads/2010/05/Persistent-Fear-and-Anxiety-Can-Affect-Young-Childrens-Learning-and-Development.pdf

Yes all of them are right