Quick just answer something its worth 50 points

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel

What is the difference between the formation and characteristics of intrusive igneous rock and extrusive igneous rock?