This is the longest man-made object on earth. a. the great manchu palace b. the great wall c. the grand canal

answer; i believe the correct answer is (the willamete valley);

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.

equal area projections

equal-area projection. a projection in which regions on the earth's surface that are of equal area are represented as equal.