Answer: Topic Sentence??
Explanation: Without context, I cannot know what they want you to say.
In this case, teachers first should Reword the question, using proper terminology So other students that hear this do not stay away from the main context of the question.
After that, the teachers should answer the question if developmentally appropriate. (they have to consider whether the student is old enough to receive the harsh answers)
Internal Factors :
earthquake and volcanic eruptions that originates under the earth surface. They are active beneath earth surface and causes changes in the crust of earth surface. They can bring changes in short period of time because of their abrupt nature .
External Factors:
Rivers , glacial current waves, rainfall , living beings ,etc are some of the examples that can bring changes on earth surface. It appears after a period of time with erosion , transportation and deposition processes. due to these effects landforms changes into plates ,U and I valley,small hills etc.
Answer: A
Explanation:liquid A only dissolved but didn’t change the substance