Word wrap can be chosen by the form designer. As the form filler, you can only work with how it was designed. If the form is for printing, you need to type less. If the form is for submitting, the whole text will be received.
If it is a multi line form you MIGHT be able to press Return to manually wrap.
When one line is full click on the next line and fill it.
Each line in this form is a separate field, so automatic word wrapping between sentences is not possible.
In order to do that the author of the form would have to merge all those fields to a single one, enable the Multiline option and disable the "Scroll Long Text" one.