Help fast! Earth science question this time ...

Why did other countries want to have a part in what was occurring in southwest asia?

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.

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer