Japan, the aleutian islands (part of alaska), and the islands of the south seas were all formed by witch of the following?

a) transform faulting of mountain ranges

b) subduction of the pacific plate at trenches

c) riffs along the edge of the pacific plate

d) collision of two plates at mid-ocean ridges

Option(d)

Japan, the Aleutian Islands (part of Alaska), and the islands of the south seas were all formed by collision of two plates at mid-ocean ridges.  

Explanation:

An island is formed when two oceanic plates collide and due to the difference in density one plate goes below the other, resulting in the coming upwards of some material. SiMa ( iron and magnesium) and mafic rocks forms the oceanic crust.

The earth's inner heat mobilize the inner mantle thus causing a movement of plates.  

i would expect light rain in pittsburgh throughout the following 24 to 48 hours. the lower/falling weights in urban areas toward the west demonstrate that a low weight framework is moving from west to east toward pittsburgh. low weight frameworks are ordinarily connected with precipitation. the way that you don't see a major drop in temperature in the more western urban areas demonstrates the low weight framework is moving with a warm front, so just light rain would be normal. substantial downpours or progressively vicious climate is just typically connected with chilly fronts, where the warm air is pushed up and over a cool front quickly. this quickly rising air (convection) is what gives you heavier torrential downpours, and other conceivably serious weather conditions.

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