To keep communism from spreading around the world.
Answer:
<em>Here is a link to were you can find your answer. ∨ω∨</em>
Link: ↓
https://www.history.com/topics/black-history/brown-v-board-of-education-of-topeka
to conserve water facilitate two ways,canals are built level.Of there ia a fiffernce in elevation between the ends of a canal,the channel is built as a series of level sections linked by locks
