The students were giggling in the classroom, so the teacher had to calm everyone down. is it a verb, gerund or participle

This is a verb. To explain this you need to understand the difference between verbs, participles, and gerunds. A verb is obviously an action that is being done to something. So the students are giggling. A gerund is in the form of a verb; however, a gerund acts like a noun. An example of this could be hiking. As a verb it would be, "We saw them last night, they were hiking up the mountain." As a gerund it would be, "When we go camping my favorite activity is hiking with Grandpa." The verb in that sentence is camping because you are doing an action and the gerund would be hiking because it is the name of the activity that you like the most. A participle is a word formed from a verb that acts as though it were an adjective. An example could be "Have you ever read The Giving Tree?" This would be a participle because giving is an action that you do;however, when you put it in that phrase it is describing the tree as a tree that gives.

thats harsh

explanation:

the support that the author, uses in the article facing our fears is a): a definition of the part of the brain called the amygdala.

he takes neuroscientist joseph ledoux's words by telling that by falling to distinguish between evolutionary old systems located in the amygdala and newer systems, centered in the prefrontal cortex, doctors have conflated non conscious threat circuits in the brain with circuits that underlie the conscious experience of fear. that, the author says, "leads ledoux to the jarring conclusion that the amygdala, a decades-old centerpiece of the brain's fear circuit, does not underlie the conscious feeling of fear".

despite this, the author points out in the article that that is a controversial notion and that evidence, in animal and humans, supports the idea that core emotions can exist outside of conscious awareness.