What is the cause of most earthquakes? 1.Convection currents inside the Earth's mantle cause movement in the crust. 2.Volcanic eruptions like Mt. Saint Helens are the main cause of earthquakes.
3.The Earth's crust breaks away and moves suddenly into the mantle.
4.Rocks layers break apart along fault lines releasing large amounts of energy.​

Which of the following episodes led to widespread charges that president reagan was not in adequate control? a. the u. s. retreat from lebanon after the bombing deaths of 241 u. s. marines as they lay sleeping in their barracks near beirut b. the trading of arms for hostages and the illegal funding of a right-wing insurgency in the iran-contra affair c. the sale of millions of acres of public lands to private corporations by the department of interior d. the proposal to congress, year after year, of federal budgets with huge deficits that ultimately ended up tripling the national debt

By granting amnesty to americans who had invaded the draft president carter hope to

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?