Question

there is no use to produce a seedless fruit is the following:
1) mango
2) watermelon
3) grapes
4) oranges

Answer 1

Normal assortments of seedless natural products incorporate watermelons, tomatoes, grapes, (for example, Termarina rossa), and bananas.

Furthermore, there are various seedless citrus organic products, for example, oranges, lemons and limes.

They originate from cuttings.

Since they originate from cuttings, new grapevines are basically clones of the vine they were cut from.