Arcology is a type of urban design that combines ecology and architecture to provide sustainable urban growth options. Which statement describes an arcology principle for sustainability? Build smaller buildings
Space buildings farther apart
Create a greenbelt around a city
Purchase inexpensive food

true skin; another name for the dermis. lies directly beneath the epidermis and is often referred to as the true skin. outermost layer of epidermis, consisting of dead cells.

the correct answers are;

a. the rock was made from more than one type of material.

e. layers of hot liquids in the rock cooled and solidified at different temperatures.

these are the two options that are related to the statement given above.