I believe it is the third choice, there was nothing then a sudden explosion, creating the universe
1.) Coastal environments, deserts, mountain environments, savanna grasslands, and forests.
2.) Each ecosystem has a different climate and people and animals who have adapted to these climates differently than the other environments. Each environment has its own resources there that the other might not have for them to survive.
~Anything you say huh, well I say sleep well tonight!
Answer:
B. Technological
Explanation:
Improved sanitation and medicine relates to technological advances
