Given the task definition and input, reply with output. You need to read the given passage and construct a question about the information present in the passage. The question should be answerable from the passage. Most importantly, only those questions are allowed whose answers cannot be determined from a single sentence. Do not generate questions that require only a single sentence to answer. Instead, try to combine two sentences and create a question from that combination. Do not create open-ended questions, i.e., the answers to them cannot be found precisely from the information provided in the passage.

Paragraph- Sent 1: Do all plants live on the land?
Sent 2: Some plants do live in the water.
Sent 3: To do this, they have evolved special traits.
Sent 4: Plants that live in water are called aquatic plants.
Sent 5: Living in water has certain benefits.
Sent 6: There is certainly plenty of water!
Sent 7: The plant does not need special traits to absorb, transport, or conserve water.
Sent 8: They do not need a large root system.
Sent 9: They do not need a strong stem to hold up the plant.
Sent 10: The plant uses the water for support.
Sent 11: Dont think water plants have it easy, though.
Sent 12: They also face challenges.
Sent 13: Living in water isnt that easy.
Sent 14: They do need some special traits to survive.
Sent 15: It is tough for the plant to reproduce.
Sent 16: Pollination by wind or animals cant happen under water.
Sent 17: Sunlight cannot reach very far beneath the waters surface.
Sent 18: Some aquatic plants have floating flowers and leaves.
Do aquatic plants require special traits to conserve water?