There would be no seasons as it is the tilt of the earths axis that causes the varying amounts of sunlight and temperatures. there would, however be some variation in temperature as the earths orbit is elliptical and so there would still be times of being closer to or further away from the sun.
I think that the best answer from the options is the following one:
B. lightly regulated markets depressing wages for unskilled workers
The thing is, unskilled workers cannot really pose many demands for their pay, because they can be replaced by other workers. This is what has led to low wages of the unskilled workers, while increasing the wealth of the richest, who own the production means.
1. Vegetation 2. Glaciers 3. Earthquake 4. Crust 5.
