Long ago, there was a rich man who had two sons. The older brother, who was called Nolbu, was greedy   and lazy. However, his younger brother Hungbu was hard-working and kind-hearted. When their father died, Nolbu inherited   his house and land, but Hungbu received nothing. One day when Hungbu was working in the fields, he found a bird which had broken its leg. He took the bird home and looked after it carefully. The bird gradually became stronger, and when summer came, it flew away to a warm place. A year later the bird flew back and gave Hungbu a seed  . Hungbu sowed   the seed and it soon grew into a plant which produced many gourds  . When Hungbu opened one of the gourds, he was amazed to see that it was full of treasure. He wanted to use the treasure to do something useful. The next day he bought a big house and moved there with his family. When Nolbu heard about his brother's good luck, he was very jealous   and decided to do the same as his brother. He also found a bird, but he broke its leg and looked after it until it became strong. The bird also gave him a seed, which produced several gourds. However, when Nolbu opened one of the gourds, goblins ( ) quickly came out of it and stole all his money. After that Nolbu went to his brother to ask for help. Hungbu was sorry for him and so he invited him to share his house. Both brothers and their families lived happily ever after. What did the bird give Hungbu a year later?
A seed. A gourd. A little bird. A plant.