In the sentence: My best friend, Dave, is in my class next year!
the commas are most likely used to
Select one:
1)show a minor pause.
2)separate items in a list.
3)set additional information apart from the rest of the sentence.
4)show a significant pause and change in topic.

set additional information apart from the rest of the sentence

Explanation:

Dave is the name of your best friend.

It's additional information because the sentence would make perfect sense like this:

My best friend is in my class next year!

Adding the name of your best friend to the sentence is adding additional information. Therefore, it needs to be separated from the rest of the sentence by commas.

Hope that helps.

is that the whole question?

the best practice

1. keep your workspace clean

2. wash your hands

3. seperate and clean chemicals and equipment

4.   use microfiber cleaning utensils

5. clean and sanitize all work surfaces

hope this !