What is true about all physical changes that involve a change of state?

The truth about all physical changes that involve a change of state is that they can be reversible or irreversible.

An example of this is water. Water, when it goes to a change of state from liquid to solid will become ice. When ice is thawed, it will go into a change of state from solid to liquid and will turn back into water.

explanation:

i believe the primary and secondary sectors

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.