Another method of layering is to partially cut a stem and keep it moist until roots form. The correct option among all the options given in the question is the first option.
The system of layering has
different techniques. It is mainly used for propagating a plant. In layering
sometimes the portion of the aerial stem grows roots while it is still attached
to the main plant and then it is separated from the main plant and allowed to
grow on its own. This is another technique used for layering.
