Which best describes francis drake?
a. he was a leader of the scientific revolution.
b. he was the first englishman to sail around the world.
c. he wrote books about his discoveries in astronomy.
d. he introduced tobacco to virginia.

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.