Answer:
a. Scott does not like feeling sweaty, so he rarely does any moderate or vigorous physical activity--- Individual factor
b. Kirstin's new boytriend loves to salsa dance, and now she goes out dancing with him two nights a week--- Environmental factor
c. Brian eats mostly fast food because there is not a grocery store close to his apartment--- Environmental factor
d. Tanya never saw her parents have a disagreement and, as a result she avoids conflict in her close personal relationships--- Environmental factor
e. Dave has hated green vegetables since he was three years old--- Personal factor.
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The answer is A, it was invaded by people from the island of minos.
There's multiple conditions that contribute so that trees can not grow in the tundra, but the most important one is the climate.
The climate in the tundra is very inhospitable. Most of the year is winter, and the soil is frozen, not just on the surface, but also deep into the ground, thus not allowing a tree to be able to develop a root system. Also, the winds are very cold and strong, so a young tree will not be able to withstand them and will break. The summer lasts for only few weeks, and it is not a proper summer, but relatively cold one, thus not enabling the conditions for a tree to be able to vegetate.