Green buildings can come in many different styles and forms. These buildings can also use a number of different efficient technologies. Any type of technology that helps to use resources better or keeps people from using too much of a resource can help to make a building green. In the second paragraph the word efficient means

emerson essentially believes that traveling is overrated. he supports this perspective through an initial focus on "the idea" of places like italy, england, and egypt, and the fascination of "educated americans" with them. he argues that those places only took on the grand, majestic ideas that they represent because "they who made england, italy, or greece venerable in the imagination did so by sticking fast where they were, like an axis of the earth." yes, those places are grand, but only because they so clearly represent the places that they are. the art and culture of italy, england, and egypt is authentic, and therefore significant.

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the answer is c.   the fact that the poet mentions what some people wear when they go to church to keep the sabbath shows that she knows about this tradition or custom. this demonstrates her authority because, when she decides the way she will worship, she knows what she is talking about and chooses an alternative to only going to church to keep the sabbath.