I think they were protected by invaders
Answer:
Explanation Bullet trains inspired by Kingfisher birds.
Wind turbines modeled after Humpback whales.
Antimicrobial film mimicking sharkskin
Absorbing shock like a woodpecker.
Cephalopod camouflage.
Ventilation systems inspired by termites
The government sector collects taxes to the people, they considered the monthly income of the individual. If the person recieved a minimum amount monthly automatically they are exempted to pay the tax. Tax used to pay for the goods
and services it provides including schools, roads, law
enforcement, libraries, parks and military protection.
Your answer is Economy, the system of production and distribution and consumption of goods and services.
