After dipping the litmus paper strips in the solutions, the answer to the question is that one is acidic because according to brad's observation on turned red and the others are basic or alkaline with the two papers turning blue.
The correct answer is A. Mitochondria is the one that is responsible for everything that has to do with energy.
1. electrostatic interactions
<span>3. van de waals interactions </span>
<span>4. hydrogen bonding </span>