I attached the answer, but you picture is empty.
Answer:
B or D
Explanation:
think of it how you use chalk on a chalk board, its less friction using chalk instead lets say a marker on a white board.
Answer:
Electrical stimulation of the brain (ESB) is used on humans during brain surgery to map out the brain and critical structures.
^_________^ <3
Answer:
The proof that in any synthesis reaction, a chemical change has occurred is that in a synthesis reaction, two reactants combine to form a new compound.
Explanation:
