Why’d does the northern part of the northern part Europe plains contain many swamps and lakes

Its numerous lakes and swamps caused by the disarranged and immature drainage pattern, together with its thin soils and coniferous forests, the Finnish plain is similar in character and appearance to northern and eastern Canada, another heavily glaciated Precambrian Shield area.

The correct answer is clerk, i did the quiz

When the indian plate collided with eurasian plate because it was cool