Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Mangrove roots are like stilts, allowing mangrove trees to rise high above the water. The trunk and leaves are above water even at high tide. A bloodroot plant uses food stored over the winter to grow flowers in the early spring. Answer: stilt like roots
A:
Why do mangrove trees rise high above the water? which characteristic help them to do so?