What are some things that need to be mobile?

Read this passage: many manufacturers prefer plastic as a material for containers because it can be molded into many shapes. but plastic is not very strong. it must be fused with glass or steel for strength. it is also not very durable. even the strongest plastic can break under enough pressure. the biggest disadvantage to using plastic is that it does not decompose. while plastic can be recycled, doing so is tedious and difficult. while it may be more expensive and difficult to work with, aluminum is a much stronger building material with far greater tensile strength. it conducts electricity because it is metal. best of all, aluminum is very easy to recycle. even if it is thrown away, it decomposes much more quickly than most manufacturing materials. how does the compare-and-contrast organizational pattern of the passage support the author's purpose? a. the passage gradually leads up to the point about decomposition to inform the reader about the importance of recycling plastics. b. the passage lists the advantages and disadvantages of each material to make a case for the use of plastic and not aluminum in containers. c. the passage begins with a description of plastic's problems in order to call attention to the good qualities of aluminum. d. the passage shows the superiority of aluminum in order to make a case for the production of stronger plastics.

You visit two websites about inventions of the 21st century. one has .edu in the url address and the other has .com. which site is more likely to be credible and why? (6 points) select one: a. the .edu site is more likely to be credible because all .com sites are trying to sell you something. b. the .edu site is more likely to be credible because its domain is a university or other school type. c. the .com site is more likely to be credible because all .edu sites are personal college student blogs. d. the .com site is more likely to be credible because its owners review all the content before publishing.

What did mark twain contribute to the history of the novel? select all that apply.