4. Give 3 examples of what had been improved to allow exploration to occur in the 15th century but not earlier.

try only asking one question

i think i will need more detail to answer if this is a specific question on a test, but technology advancements are good for many industries, such as medicine or food industries, new technology could us in medicine in ways such as new scanners to tell us more about our bodies or new cures or vaccines for diseases.