Given a scientific passage and an answer, generate a question for the given answer.

Passage: Sponges reproduce both asexually and sexually. Asexual reproduction occurs by budding. Sexual reproduction occurs by the production of eggs and sperm. Males release sperm into the water through the osculum. Sperm may enter a female sponge through a pore and fertilize her eggs. The resulting zygotes develop into larvae. Answer: asexual
Budding in sponges is a form of what type of reproduction?