I'd say probably Biomass, not 100% sure but it's renewable, but it can create power and heat.
Answer:
Mass
Explanation:
I'm not for sure but I think its Mass. Please let me know if that was right or wrong.
I believe it is D solid to gas
The question is somewhat confusing. I would choose "none of the above" because none of the choices are blood vessels. However, the heart is the pump that moves blood through the network of blood vessels that distribute and collect materials throughout the body.
