Name one holy destination and its importance to the religion for each of the following belief systems.The belief systems are: Christianity Islam...

Christianity -- a major holy destination is Jerusalem.  That is the site of, among other things, the crucifixion and resurrection of Jesus.

Islam -- the major holy destination is Mecca, in Saudi Arabia.  Mecca is holy because that's where the Prophet Mohammed received his revelations and where he spent the first years after the start of Islam as a religion.

Buddhism -- a major holy site is the tree under which the Buddha is supposed to have attained enlightenment.  That is called the "Bodhi Tree."  It is in the city of Bodh Gaya or Gaya in the state of Bihar in North East India.