bottom leafs

i was woundering is it ok to pinch of the lower fan big fan leafs to let light get to the new branes pluse im kinda low on room seeming im growing in my closet, iv tryed pinching some of one of the plants to exprement an it seemed to be a great hlep in the under growth but somtimes thing can be...

Why are the bottom most leafs yellowing, I'm not using any nutes, and I'm growing in fox farm ocean Forrest soil, one is pretty much completely yellow and the other one is just about there. If these die off is it normal? It's not the first seed leafs but the set after that, what do I do Other...