Which of the following organisms is typically classified in Ciliophora?

Ciliophora, commonly known as ciliates, is a group of protozoa characterized by the presence of hair-like structures called cilia on their surface, which they use for locomotion and feeding. Paramecia, which are unicellular organisms often found in freshwater environments, are a prime example of ciliates. They utilize their cilia not only for movement but also for directing food particles into their oral groove, facilitating the process of feeding.

In contrast to Paramecia, green algae belong to the group of photosynthetic organisms, amoebas are known for their shape-shifting abilities and lack cilia, and radiolarians are more complex marine protists with intricate silica skeletons. None of these organisms share the defining characteristic of cilia that categorizes Paramecia within the Ciliophora class, making it the correct answer to the question regarding which organism is typically classified in Ciliophora.