There are 5 main types of lines in art: vertical lines, horizontal lines, diagonal lines, zigzag lines, and curved lines. Other types of lines are simply variations of the five main ones. I believe this is what you’re asking but if you have anything else to ask let me know in the comments! Also apologizes for all the bot replies :)
A.Chef A is correct.
To give the soup an added or contrasting flavor and also for presentation of the soup so that it can be appealing to the guest.