The correct answer is D. Because 'in a tree' is misplaced, we don't know whether the dog is in the tree, or if two blue jays are.
The past participle is used with the verb have (have / has / had) to create the present and past perfect tenses. The past participle form is also used to modify nouns and pronouns. One example is the phrase sliced bread. The past participle is usually the same as the past tense form.
Answer: "Oh, it isn't here naturally, of course. I have to stock the island."
"I wanted the ideal animal to hunt,"
Answer: A) Li says learning to speak French is easier than you think.
Explanation: Basically, an infinitive verb is a verb with the word "to" in front of it.
I hope this helps!