Answer:
D
H
I
Step-by-step explanation:
In the paragraph, the author describes the inhabitants of Mars. They are smarter than us and are studying humans. There is no mention of them having compassion, actually, they schemed against us. Their study about us shows their interest in our planet. In the first group, the plan of invading us is the only one you can find in the paragraph.
Following these ideas, for the second group, their study is not in science but humans, and this shows their interest, so 'they are observant' is the line that is describing the inhabitants of mars.
If they drew a plan against us means they don't want to be our friends and they do not feel sympathy for the humans. They are watching with envious eyes, envy wants what the other has, in conclusion, they want what humans have.