The 3 part plan for the North to win the war included O Capturing Richmond, Virginia
O blockading the Southern ports
O gaining control of the Mississippi River
O All the above
O None of the above​

It's all of the above

Explanation:

the top Three are all parts of the 3 step plan. hope this helps

chemicals that are toxic to plants

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.