Answer:
Constructive margins occur when two plates with the same density (continental or oceanic) move away from each other, which causes magma from the mantle to rise to the surface. ... Destructive margins occur when one plate is denser than another and move towards each other.
Answer:
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After the breakup of Pangaea, Australia became an island, thus it was isolated, had its own unique conditions, so according to that unique flora and fauna developed.
Explanation:
Australia was once part of the supercontinent of Pangaea. This supercontinent broke apart though, so later Australia was part of Gondwanaland, together with all of the southern continents at present. Gondwanaland too broke apart, and Australia drifted eastward, becoming an isolated island for tens of millions of years.
As Australia became an island, the environment changed, as the climate changed. Being isolated meant that the flora and fauna didn't had any outside competition, so they were able to evolve in accordance to the environment on the continent without any disturbances. Over the course of millions of years this resulted in the development of flora and fauna with unique traits, which only had similarities with the one from South America until a land bridge opened up with North America.
A) In Canada there's more hardwood and thus it is more common in the forest product output.
b) The hardwood is predominantly on the north. Hardwood trees are the trees that usually prefer colder climates and since there's not much landmass on the south half on the Earth closer to the pole, they are mostly on the north.
c) Softwood: Pine, Cedar, Cypress . Hardwood: Oak, Birch, Poplar.
