I'm a unit of energy, but I have no power. I'm often counted, but I'm never seen. You can burn me, but I'm not a fire. What am I?

I can be of gold, iron or salt, What am I?

I bloom upon the face with grace, a quiet light no words replace. In joy I grow, in warmth I stay, then gently fade and slip away.

Change my middle to a D and ride a bike. Remove my last and fight for animal rights Pick me one by one and see who you like Spread a lot of me over the honeymoon suite for romantic nights

I have arms but no hands, and a bridge with no water. I have to stick close to your face unless I fall off.