Can I just use "block", not "block out"?
It depends on the context of the sentence. In this sentence, you would not be able to use just "block." When you "block" someone, it is typically used in the context of technology, such as blocking someone's messages or calls. It's also used to physically block something. "Blocking out," usually means to not listen to something or someone. In this video, you would have to use "block out." This is because Elsa is saying that she is refusing to listen to the siren's calls. Here are a few examples of "block" being used. Ex: She blocked his calls because he wouldn't stop calling her. Ex: The basketball player blocked his opponent. Here are a few examples of "block out" being used. Ex: I'm just going to block out your voice. You are distracting me. Ex: She tried to block out her sister's screams. I hope this makes sense to you! Thanks for your question!