Primary Economic endeavors in The middle colonies

The Middle Colonies enjoyed Largely agricultural, farms in this region grew numerous kinds of crops, most notably grains and oats. Logging, shipbuilding, textiles production, and papermaking were also important in the Middle Colonies.

the correct answer is a: 1 (the pacific ranges)

more about the pacific ranges:

the pacific ranges are the southernmost subdivision of the coast mountains portion of the pacific cordillera. located entirely within british columbia, canada, they run northwest from the lower stretches of the fraser river to bella coola and burke channel, north of which are the kitimat ranges

elevation: 13,186′

area: 41,791 mi²

province: british columbia

parent range: coast mountains