Answer:
1) external
2) internal
3) internal
4) external
5) internal
Explanation:
1) It is talking about the conflict between a person and the natural world, in this case, the environment with the poisonous air.
2) She was having an internal conflict with a psychological struggle within the mind, in this case, a feeling of nervousness walking into the classroom.
3) Thomas wasn't physically alone or rather just had a mental struggle with feeling lonely without being alone physically.
4) She had a struggle against the natural world, in this case with the rain ruining her painting.
5) Venus was having an internal conflict with a psychological struggle within the mind, where feelings of confusion confronted her and tormented her because she never overcame theese feelings before.