North Vietnam went to war with the republic of Vietnam via it’s proxy the Viet Cong, in the attempt to get south Vietnam under the control communist party.
I hope that helps.
Shirt- cotton
jacket- leather
dress shoes- leather
jeans- denim
skirt- polyester
sneakers- canvas material
dress- velvet
sweater- satin
The answer is D- a case study.
It's the same meaning of case as is used in police investigations- "they solved the robbery case". It's one study- or investigation- of something that may happen again.
Answer: supplied air mask
Explanation: because air can go in the mask and the gases and fumes can hurt you.
