<span>
The correct way to write this sentence is as follows,</span><span><u /></span>
<span><u>Your </u> brother is the newest member of the team.</span>
<span /><span>C. Your is the correct answer.</span>
<span />A. is wrong because you wouldn't say, yours brother.
<span>B. is wrong because yours should never have an apostrophe.</span>
<span>D. is wrong because you're is a contraction for, you are. And you wouldn't say 'you are brother' is the newest member.</span>
<span> Hope this helps. :)</span>
The best answer would be C. zeal. Zeal means enthusiasm for a cause which makes sense in this sentence.
Ire means anger, that doesn't fit. Neither does prodigy (meaning someone who is exceptional, especially at a young age), nor fete (meaning to entertain someone).
D. object of the preposition