Yes they have eyebrows.
Thick eyebrows are not ugly. According to most people associating with beauty, thick eyebrows have been picked for most gorgeous. And something else...who would want their eyebrows to be a line? I am one of those people who wouldn't.
You had it correct - eyebrows.
yes because people might shave or wax them
Of course! Surprised is an emotion not a body part. Even without eyebrows showing the surprise, you can still be surprised.
Some people use clear mascara on their eyebrows because it is a clear gel that can be applied to the eyebrows with a brush to tame them. It is also great for the eyelashes to put as a sealant over your mascara to stop it from smudging.
to keep them trimmed and healthy looking
Because people have eyebrows, and he wanted to make his paintings real, not like something out of a Science Fiction movie.
No, monkeys do NOT have eyebrows.
The trait of big eyebrows lasts only for 9 years at max. The people with big eyebrows have certain mutation in a gene that soon corrects itself. Sincerely, Dr. Jackton Gene Scientist
...None. Other people in the simpsons has them but not in the family.