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(a) The coordinates 70.205689°N 153.412494°W lies towards the northern end of Alaska. It is about few kilometers from Arctic ocean. So, there are two possibilities by which this landform is formed. First one is that this landform is the part of Delta and exposed due to regression and thats why drainage pattern could be seen there. Because may be in earlier time this was the part of ocean and rivers were falling into the oceans to make this type of landform. Second possibilty is that many rivers are coming to join ocean because of low level of ocean and the rivers are meandering rivers and changing their coarse time to time and the remains are small basins or ponds.

(b) The coordinates 52.141132ºN 117.188803°W lies near Athabaska glacier, Alberta in Canada. This is basically glacial landform feature. Year after year, rivers of meltwater rush down into the rocks underneath. This plumbing system and gravity cause glaciers to slide. And like any slow moving river, the Athabasca is also creeping at the rate of few centimeters per day.

(c) The coordinates 56.210697°N 74.519562°W lies in the North-west part of Quebec, Canada. And the landform present here is basically a clean water lake which is also known as Lac wiyashakimi. But the main thing about this lake is that it is crater lake that is form by the collision of meteorite to the earth surface which produce a big crater or basin and later this was filled by water. And this is basically double crater lake means two meteors collided with earth surface. And some scientists beleive that these two craters were formed in the different time period.

(d) The coordinates 26.645877°S 130.065226°E lies in the NW part of Southern Australia. And the landform present here is basically a desert. And ripple marks which are produced by the blowing of wind are present in this area, they seem to symmetrical ripple mark and by studying them the direction of blowing wind could be known.

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