Seventeen-year old best friends Antonio Cruz and Felix Vargas both dream of becoming light-weight boxing champions of the world. They train together and they find out that they will meet in the ring to determine who will fight in the championship tournament. They pledge to fight to win and agree not to meet until the big night, a week away. Then before a roaring crowd, the boys trade punishing blows for three furious rounds. In the end, both are still standing. They rush to embrace and leave the ring arm in arm, not waiting to hear who won
It is definitely not B nor D because those two have negative meanings. It can't be C because excessive means "beyond the usual", which has a slightly negative meaning.
The answer should be A, conversational.
Answer: "pheromones" .
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<u>Note</u>: "Odorless chemicals" that serve as "signals" to members of one's own species are called: <u> pheromones </u><u /> .
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