My understanding of the pertinent terms in this specific context is as follows:
1) Multiplying: Asexual reproduction only.
2) Reproduction: Sexual and asexual reproduction.
3) Procreation: Sexual reproduction only.
1) Multiplying: Asexual reproduction only.
2) Reproduction: Sexual and asexual reproduction.
3) Procreation: Sexual reproduction only.
BTW: I don't see how 'multiplying' could refer to just asexual reproduction. People often use it in sentences like 'the deer population near here multiplied the last couple years'.
As you can see, getting terminology right is challenging and not always straightforward.