Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
you hold my tail while I fish for you
I am the thing that is used to make your weight. What am I?
I am heavy forward, but backward I'm not. What am I?
I have lakes but no water forests but no trees and cities but no buildings. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?