The river is South America's third-longest river, and the largest river system in the Tropical North 1. Orinoco

2. Magdalena

3. Guayas

4. Cauca

b

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the results of roman expansion produced social conflict and civil war. julius caesar gained power and became a dictator but was then assassinated. the reign of augustus began a long period of imperial rule and peace in the roman empire. rome faced the problems of how to maintain peace, law, and order.

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it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.

interest groups send representatives to state capitals and to washington, d.c. to put pressure on members of congress and other policymakers. they engage in lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.