•       A. The primary and secondary sectors differ due to the primary factor is the producer of the materials and the secondary sector is the conversion
•     The tertiary sector is different due to it being the sector which provide goods and services to the public, although they do not produce them.
•       Do not understand the question.
•      Research is part of the tertiary sector.
•      A. The development pathway is from LEDC to MEDC and is a rating style for cities.
•      B