Let me help you to understand it better :-
Non underlined part says, Visitors to the park have often looked up into the leafy canopy and
and connect two parallel sentences so have seen a,b,c out
Between D and E after comma whose is distant from monkey not correct so D is correct
Non underlined part says, Visitors to the park have often looked up into the leafy canopy and
and connect two parallel sentences so have seen a,b,c out
Between D and E after comma whose is distant from monkey not correct so D is correct
