They allow magma to burst between cracks, and they cause blocks of rock to seperate and form new plates.
Sedimentary rocks is a source of fossil fuel.
Answer: High-income households are more likely to have computers or Internet access. Among family households with incomes of $75,000 or more during the 12 months prior to the survey, 88 percent had at least one comput- er, and 79 percent had at least one household member who used the Internet at home in 2000.
Explanation:
In urban areas, there are more people, therefore not a lot of farmland. (that eliminates C) If city buildings don't allow flood waters to recede, that could be dangerous in many ways. (So A is still a reasonable answer) If most cities are built in flood zones, there should be some form of shelter if houses aren't safe. Pollutants and diseases being carried in water are already dangerous, but easier to spread with rapid flood waters that are sweeping everywhere. So your best answer would be either A or B.
