Making changes to improve the quality of life for people.
Answer:
To give a demonstration of (something, such as a product or procedure), to show how (something) works, is prepared, or is done.
Explanation:
Answer:
a
Explanation:
A carcinogen is another way of describing a substance that can cause cancer, while a biopsy is a type of operation that examines a person's tissue to see if they have a certain disease. Hope this helps!
Answer:
If you're descending the trail, step aside and give space to the people climbing up.
