Please choose the correct answer to the question: It's quite common for birds feeding on seeds from flowering trees in some tropical waters to get weighed down, pricked and even entangled in the branches because

Answer1: seeds sprout better on the ground Answer2: smooth seeds need water to reach other islands Answer3: the seeds have a thick, sticky coating with hooks Answer4: scavengers also hunt for seeds with mucousy coatings

Answer format: answer1/answer2/answer3/answer4