3. Helps protect life on earth
Answer:
All villagers were ranked by their abilities and level of skill.
Explanation:
After the hunting-gathering period, in the human history, people began to settle down. This transition of people from homes built for certain time to permanent settlements.
This transition era is known as Neolithic Revolution. This period also marked the beginning of human civilization and social stratification. People began to cultivate lands, domesticate animals, etc.
As the society begin to expand, social stratification became more divisive. People began to divide social class based on the resources they owned, their skills, and abilties.
Thus the correct answer is the first option.
It would be D because it describes the age of the sea floor
Answer:
spring
Explanation:
A spring forms where the water table intersects the ground surface. Sometimes, the ground surface is lower than the water table. This forms a natural water flow as a spring.
- An artesian well occurs where pressurized formations containing ground water is found.
- Unsaturated zone is not filled with ground water.
- An aquifer is a porous and permeable formation that can store ground water