Yes, the o in both words have the same vowel sound.
You mean eve or THERE IS ONLY ONE GOD THERE IS NO GODESS
The correct answer is their. Because his or her wouldn't make sense because it says they, his also wouldn't make sense for that reason, and the other form of there means for example, "over there"
1. has no receiver of action named - intransitive verbs
2. a principal part of verbs tense - linking verb
3. you will be seen - future passive
4. expresses time - past participle
5. is followed by a predicate adjective or predicate noun that renames or describes the subject
6. manner in which action is presented - verb mood
7. form their past and past participle by adding -ed, -d, or t - regular verb