To determine which of the organisms show budding, we will analyze each of the options provided: yeast, hydra, and spongilla.
### Step 1: Understand Budding
Budding is a form of asexual reproduction where a new organism develops from an outgrowth or bud on the parent organism. This process involves the formation of a small bud that eventually detaches and grows into a new individual.
### Step 2: Analyze Yeast
Yeast is a type of fungus that reproduces asexually through budding. In this process, a small bud forms on the parent yeast cell, grows, and eventually separates to become an independent yeast cell. Therefore, yeast does show budding.
**Hint**: Remember that yeast is a unicellular organism that can reproduce asexually through the formation of buds.
### Step 3: Analyze Hydra
Hydra is a freshwater organism that also reproduces asexually by budding. A bud forms on the body of the hydra, develops mouth and tentacles, and eventually detaches from the parent to live independently. Thus, hydra also exhibits budding.
**Hint**: Hydra is known for its regenerative abilities and can reproduce by forming buds on its body.
### Step 4: Analyze Spongilla
Spongilla, a type of freshwater sponge, can reproduce both sexually and asexually. Asexual reproduction occurs through budding, where a new sponge develops from a bud on the parent sponge. Hence, spongilla also shows budding.
**Hint**: Spongilla can reproduce both sexually and asexually, but budding is a key method of asexual reproduction.
### Step 5: Conclusion
Since all three organisms—yeast, hydra, and spongilla—can reproduce by budding, the correct answer to the question is "all of these."
**Final Answer**: All of these organisms (yeast, hydra, spongilla) show budding.
