6. Which is NOT a solution to erosion caused by longshore currents: c. beach fences
d. beach re-nourishment
a. seawalls
b. breakwaters

[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a. light in water b. light in vacuum c. sound in air. d. sound in water

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.

Name the two rivers that run through the fertile crescent. how were the rivers both positive and negative to societies of the fertile crescent?