lead is the basic word in leader.
a lead a lead
Lead (Pb) is included in group 1 of basic radicals because it forms basic oxides and hydroxides when reacting with acids. This means that lead compounds can neutralize acids and have properties of a basic radical.
Its either the halter or lead but i think lead
A halter
The basic concept of water pollution is that if the water resources we have now become polluted this can lead to damage of the soil ecosystem which will eventually lead to drinking water pollution.
Halter
microscope
A halter and lead line. The halter is placed around the horse's head and the lead line is clipped on to the halter so you can lead your horse with the lead line. Lead line=Same as lead rope ;)
The optical microscope.
Magnificent Seven
There are two things actually. 1-a halter 2-a lead rope