The correct answer is Adverb clause. Hope this helps you.
Those two final stanzas suggest that although the poetess usually feels very comfortable being outdoors, she feels fear before the "narrow fellow in the grass". Her "tighter breathing" suggests that she is left breathless when confronted with this creature, breathless with fear or wonder, when it is close. She is frozen, cannot move due to the fact that she is very frightened.
Paine says that it is irrational and absurd for such a huge amount of land with practically unlimited resources, to be dominated by such a small island. So basically he said that the argument lacks evidence and ethos
