Which aspect of the climate led settlers in the Fertile Crescent to dig canals? O cool winters
O long droughts
O long rainy seasons
O short planting seasons

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

explanation:

id do!

d is the correct answer