Reading Comp . The paragraph is the main structural unit of any passage. You are taking the test on a computer screen. You cannot label the paragraphs.
Some students feel comfortable drawing the diagram.
Because the technology of water management involves similar construction skills, whether the task is the building of an ocean jetty for protection of shipping or the construction of a river dam for flood control and irrigation, the issues of water policy have mingled problems of navigation and agriculture. A further inherent complexity of water policy is the frequent conflict between flood control and irrigation, between requirements for abundance and those for scarcity of water. Then there are the problems of cities located along the major American rivers, not infrequently directly on the very flood plains of highly erratic streams. In the arid parts of the land, it has recently become clear that climate varies over time, with irregular periods of serious drought followed by wet periods marked by occasional floods. The problems of land and water, then, are inherently difficult.