Due to coming together of what does the dream arise? Buddha explains how world came to be by saying eye and forms come together to create eye consciousness. Coming together of eye, forms and eye-consciousness created contact. Contact lead to feelings which lead to birth , death and suffering.
Same applies to ear , nose , tongue , mind.
But when we sleep the eyes are shut yet we see the dream. How is that possible ? In that dream I am able to see, hear , touch  and feel.
Due to which contact in this real world am I able to live the dreams ?

My question is : due to coming together of which internal and external senses does the dream arise ?
A dream consciousness is a mental consciousness arising in dependence upon a mental sense power. While an eye-consciousness apprehends shape and color (which is form), a dream consciousness apprehends a phenomena source. A dream consciousness and its objects simultaneously arise from a seed left in one's mental continuum.
In his commentary to Lorig, Geshe Jamphel Gyaltsen said:

The blue in the dream is form included in the category of 'phenomena
source'. We have the form source, related to the eye consciousness,
etc. The phenomena source is the source for mental consciousness only.
The blue in the dream is included in that category.
The only source taken in the sleeping state is the phenomena source
and therefore more subtle. Between dream and deep sleep, in the dream
you still have many different manifestations of the phenomena source,
whereas in deep sleep you don't have these manifestation.

Not all mental consciousnesses have a phenomena source as their object of observation. For instance, the divine ear is a clairvoyance that is a mental consciousness apprehending sound, which is form.
Furthermore, in his commentary to Purbuchok’s 'Explanation of the Presentation of Objects and Object-Possessors as well as Awarenesses and Knowers', Geshe Tenzin Tenphel says:

The first, [a mental non-conceptual wrong consciousness] is, for
example, a dream consciousness that clearly sees as blue the blue of a
dream. This subject is a mental consciousness, a non-conceptual
consciousness, and a wrong consciousness.
• it is a wrong consciousness because of being a consciousness that
apprehends its object, a form which is a phenomenon source, as blue,
whereas it does not exist as blue.

In other words, dream-blue is not actual blue. It is not form but phenomena source. Thus, 'seeing blue' in a dream is the function of a mental consciousness and one is not actually seeing.