Is this parallel perpendicular or neither please help

I'll give brainliest if you answer right : )

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?