The first.
The word "favorite" has the stress on the first syllable, "fa-vo-rite."
Deliver has the stress on the second syllable.
First
The first.
second
However is stressed on the second syllable. (hou-ev-er)
The first syllable.
No, "service" is not a first syllable stress word. The stress falls on the second syllable in "service."
The stress is on the first syllable.
Complain has two syllables. It is not clear what the question is, but one possibility is that it is asking whether the stress is on the first or second syllable. The answer to that is that the stress is on the second syllable.
No, the stress is on the first syllable. ROW-dee.
If you stress the first syllable, it means the eighth month of the year. If you stress the second syllable, it means respected and impressive.