Answer:
A gravitational singularity is a one-dimensional point which contains a huge mass in an infinitely small space.
Explanation:
A gravitational singularity lies in the center of a black hole. A gravitational singularity is a one-dimensional point which contains a huge mass in an infinitely small space. In this infinitely small space, density and gravity become infinite and the laws of physics cease to operate.
A or d are the most reasonable answers
Answer:
There is a demand because people can use the money to purchase the goods and services they need and want. Goods and services are what ultimately matter in the economy, and money is a way that allows people to acquire the goods and services that they need or want. It allows people to obtain what they need to live.
Explanation:
A.The Roman empire relied on physical features as natural barriers.
