Your answer needs a little elaboration:
For every human being who believes in Allah, there are two
distinct spheres of interaction in which relationships come into existence. The
first sphere covers a person’s relationship with Allah, while the second one
constitutes a person's relationship with his fellow human beings. Islam and all
divinely revealed religions nothing but guide human intellect in these two
spheres. A person’s relationship with Allah manifests itself in worship, which
in Islam has some distinct forms. Similarly, a person’s relationship with his
brethren takes the form of social interaction, which again has many areas. Total
or partial negation of any one of these spheres results in an unbalanced life.
Extremism in the first sphere breeds monasticism and ascetism while extremism in
the second one breeds materialism. Islam wants every person to create a balance
in his life by giving each sphere its due. Similarly, it wants a person to
undertake the various prescribed forms of interaction in both the spheres since
each has a definite purpose.
In the first sphere, Islam has prescribed specific forms of
worship of which one form cannot replace the other, since each has its own
purpose and objective. Animal Sacrifice is one such form of worship. It has an
underlying philosophy which must be well be appreciated in order to do it in
letter and spirit. Just as Salah cannot replace Zakah and vice versa, animal
sacrifice also cannot be replaced by Zakah or charity. What animal sacrifice
induces in a person, Zakah or Salah or Hajj do not.
The raison d’etre for animal sacrifice on Eid is to
commemorate a great event which depicts an extraordinary expression of
submission to the command of Allah – the essence of Islam. The Prophet Abraham (sws)
while obeying the Almighty set a platinum example of this submission. When we
offer an animal in sacrifice, we actually symbolize our intention that we are
ready to submit ourselves to Allah in any way that may be required by Him, just
as His great Prophet Abraham (sws) had once done so with spirit and splendour,
glory and grandeur.