Whose explorations led to a greater knowledge of north america, the arctic, australia, and the hawaiian islands?

Henry Hudson's and James Cook's.

Explanation:

Captain James Cook (1728–1779) was a British explorer, sailor, cartographer, and commander in the Royal Navy. He created accurate maps of Newfoundland. Later, in three excursions into the Pacific Ocean, he reached the earliest documented European contact with the eastern coast of Australia and the Hawaiian Islands, as well as the first registered circumnavigation of New Zealand.

Henry Hudson (1565-1611) was an English navigator and explorer that became well known for his travels in what we now know as Canada and some areas of the northeastern United States.

all freedom fighters demanded for constitution. so british finally granted india it's freedom. then a constituent assembly was formed. it's chair man was rajendra prasad and its deputy chairman was dr. br ambedkar.

this assembly take the time of about one year than our constitution was finally formed.

explanation: