What is the advantage of having more than one pigment molecule in a photocentre?

(a)Light reaction depends upon the amount of solar energy trapped by the pigment molecule.
(b)Energy trapped by a single pigment molecule is not enough to start the initial reactions which may occur in light.
©A number of pigment molecules capture light over a large surface area, and later on pass it on to photocentre.
(d)The presence of a number of pigment molecules would provide protection to the chlorophyll molecule against photo-oxidation.