What is this plant, and should the lowermost leaves be curling up?
I may be wrong, but I believe these are two Foxtail Agaves (Agave attenuata). These resources may help you take care of them.
Foxtail Agave Care Information
And for the wilted leaves:
How to Save a Dying Agave Plant
Also, the Gardening SE may be able to help more.
Hopefully this helps!