Q: You are given a paragraph, with numbered sentences, and a question. Write the numbers of the sentences needed to answer the given question. Separate multiple sentence numbers with a comma (", "). E.g. "1, 2" would be the correct response if Sent 1 and Sent 2 are needed to answer the given question (do not include sentences that contain no information that is necessary to answer the question). Sort the sentence numbers in an increasing order (i.e., '1, 2', instead of '2, 1'). Your answer should not contain anything than the sentence numbers separated by a comma (e.g. '1, 2, 3, 4'). The given question requires more than one sentence to answer. So, your answer must contain at least one comma (", ").
Paragraph- Sent 1: Some traits help a living thing survive.
Sent 2: These traits are called adaptations.
Sent 3: Some adaptations are better than others.
Sent 4: Look at the cactus in Figure 3.1.
Sent 5: Its leaves look like needles.
Sent 6: Their shape helps the plant live in dry climates.
Sent 7: The needle-like leaves help it to not lose water.
Sent 8: Why is that important for a cactus?
Sent 9: Cactus live in deserts.
Sent 10: Deserts receive very little rainfall.
Sent 11: Other plants are better suited for locations that are wet and shady.
Sent 12: These are opposite conditions to the desert.
Sent 13: Palm trees grow in the rainforest.
Sent 14: Rainforests have a lot of rainfall.
Sent 15: The palm tree has very large leaves.
Sent 16: They do not have to worry about losing water through their leaves.
Sent 17: As a result, palm leaves are very wide.
Sent 18: Plants that live in sunny locations do not need large leaves. 
Question: Do any plants with leaves that look like needles live in the desert?.
A:
4, 5, 9.