Power/electricity, when the water flows through newer dams, the power of the current spins turbines, generating energy.
Answer:
The third line of defence against pathogenic invasion is the adaptive immune response, which has two key qualities: It is specific (it can differentiate between specific microorganisms and respond accordingly) It is adaptive (it can produce a heightened response upon re-exposure - in other words, it has memory)
Explanation:
This is option 2 hope I helped. :)