Answer:
2. muscular system and cardiovascular system
B is the answer hopefully is accurate
Answer: I don't have a definitive answer for this question but I do have a helpful explanation.
Explanation: Try to find out what each letter means and organize the elements by how they connect to each other. If you don't know you can research to find a diagram that can help show you how to connect these functional elements. You could try searching how do you find the elements of HOH in a diagram.
To maintain pressure within plant cells and keep structure while growth ensues. Good luck, milady. *Tips his fedora*
