Answer:
B. Technological
Explanation:
Improved sanitation and medicine relates to technological advances
Answer:
Iron cannot release energy either by fission or fusion.
Explanation:
When a high-mass star runs out of hydrogen inside its core, it starts burning helium, and then heavier elements until it reaches iron.
Nuclear fusion of iron cannot occur, because the amount of energy required for the fusion of two nuclei of iron is larger than the energy released.
Therefore, when all the lighter elements lighter than iron have already fuse together, the star cannot burn any other element, so the nuclear fusion inside the core stops and the star collapses on itself, producing a huge explosion known as supernova.
They B)
probably did not cross the oceans.
Despite our many differences, Americans have always come together every Independence Day to celebrate our national birthday. Which is truly fitting. From the nation’s beginnings, our leaders have warned that strength can be found only in unity.
America has always sought to help immigrants incorporate their unique values and culture into the melting pot that is America. Becoming American has nothing to do with birth, ancestry or ethnic identity; it is a state of mind, heart and beliefs.
Ans=
Economy - overview: Saudi Arabia has an oil-based economy with strong government controls over major economic activities. It possesses about 16% of the world's proven petroleum reserves, ranks as the largest exporter of petroleum, and plays a leading role in OPEC.
Explanation:
