Question

First to explore the St Lawrence river

Answer 1

Hello there!
Its a great pleasure for me to be helping you today!
The St. Lawrence River that is in Canada, was discovered by a French navigator Jacques Cartier. His first scene of the river and the golf around it inspired him to go on a second expedition in 1535.
Hope i helped today!
-Sammy)

Answer 2

Jacques Cartier. I hope this helps.