He was frustrated for obvious reasons. But was described as 'perplexed and still' because he expected a answer from the inmates that were inside the house, but instead of answering his repetitive calls, they chose to give no response leaving the traveler to experience his 'stillness'.
C is the answer , breathing problems and air pollution relate
I would say that the best theme to address those key points listed, would be: A. Feeling hopeless is unreasonable when faced with challenges. In other words, we shouldn't feel as if the end of that world is at hand, just because challenges and tests come our way. That is to be expected. Hope that helps.
The dance squad had eight members when it won the competition.
A relative clause can be used as an adjective or an adverb. Relative clauses must contain both a subject and a verb. They also begin with a relative pronoun (question words and that). The relative clause in the last option is "when it won the competition". It starts with "when" which is a relative pronoun. It describes when the action takes place which makes the entire clause an adverb. It has a subject "it" and a verb "won". Options B and C should be immediately thrown out because they do not have a relative pronoun. Option A does not work because there is no subject after "that".
