The problem which River often faces which is the feeling of anxiety during class when he can't check his phone for new text messages or emails is called a:
According to the given question, we are asked to show and describe the problem which River faces when he feels anxious in class when he cannot check his phone for new messages.
As a result of this, we can see that in this situation where River feels anxious during class when he cannot check his phone during class is an example of a panic attack because when it happens, the person who gets it is extremely anxious because he believes something bad would go on.
Therefore, the correct answer is Panic attack
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https://brainly.com/question/25454849
