Depression is a stage of grieving in which

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

How could natural selection best be used to explain the evolution of the white fur of arctic fox

For my health class we were given a bunch of pictures of pregnancy tests for extra credit we have to say if they’re negative or positive. i can’t tell if this is a shadow or if it’s a faint positive