Why do different parts of cities have different levels of development?

HURRY PLEASE

Plants can have a positive and negative effect on the rate of weathering

Ateam of researchers calculates that a glacier will melt completely away in the next 100 years. which land structure will most likely be left behind after the glacier melts?

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called