Resolution is canvas; Bitrate is bandwidth
Resolution (e.g. 1080p, 4K) sets pixel dimensions. Bitrate sets the budget of data allocated to describe those pixels each second.
A high-resolution video encoded with too low a bitrate will look blurry and full of compression artifacts.
Frame rate matters
A 60 fps video requires more bitrate than a 24 fps or 30 fps video to maintain the same visual clarity per frame.