What are the three main types of volcanoes?
a. shield, cinder cone, and mafic
b. composite, shield, and cinder cone
c. felsic, mafic, and composite
d. shield, felsic, and mafic

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution

Determine which of the two measurements in each set is lesser.10°f or 20°ca. 10-fb. 20°c