The word that best describes the tone in this stanza is: happy.
This stanza was taken from the poem I Hear America Singing, by Walt Whitman. It's a poem of patriotism, of pride of each and every person who helps build America and make it what it is. Everyone is important: the carpenters, the mechanics, the masons, the mothers, the wives. All of them sing their melodious songs of freedom and opportunity.
According to Pi, a zookeeper will know he or she has created a healthy environment for the animals WHEN THE ANIMALS REPRODUCE.
For animals to reproduce and give birth to young ones, many things has to be in place, such as suitable partners, right environment, right food, etc. Animals naturally reproduce when the environment is favorable unto them. Thus, reproduction of animals in the zoo shows that the right environment has been created for the animals.
The word or phrase that best connects the ideas in the sentences in question is D, that is, your anwer would be "in contrast".
The first part of the passage shows that we should have the right to choose sodas or snacks if we want to, we should be given the right to do that. On the contrary, the second part of the passage talks about that sometimes having too many options is not a good thing and it makes us unable to make the right choice.
Answer:
Definition/Explanation Clues. Restatement/Synonym Clues. Contrast/Antonym Clues. ... Inference/General Context Clues. ... Punctuation.
Explanation: