The infinitive phrase in this sentence is to speak clearly, and it is used as a subject of the sentence. What/who is essential to being understood? To speak clearly.
Okay, did you have a conversation with one of the higher people in your school? If you're uncomfortable report it to the office.
Answer:
Climb Uruk's wall and walk back and forth! Survey its foundations, examine the brickwork! Were its bricks not fired in an oven?
Explanation:
It is at the beginning and at the end...It all comes full circle. Like the circle of life, this is a new Uruk.