ans will be organ level only. because if we say organ system level then u must have studied that platyhelminths have "incomplate digestive system". means organ level will be the right ans. organ level system has not developed here properly. it developed from ashelminths n onwards.

Platyhelminthes, commonly known as flatworms, are a phylum of invertebrate animals that include various species such as tapeworms and planarians. When it comes to their organization, there seems to be some confusion regarding whether they exhibit organ-level or organ system-level organization. Let's delve into the details to clarify this matter:

1. Understanding Organ-Level Organization:
In an organ-level organization, different tissues come together to form organs, which perform specific functions. Each organ is made up of two or more tissue types working together. These tissues are collections of specialized cells with similar structures and functions.

2. Exploring Organ System-Level Organization:
In an organ system-level organization, different organs work together to perform specific functions. Each organ system is responsible for a particular set of functions, and multiple organ systems interact to maintain overall homeostasis in the organism.

3. Analyzing the NCERT Reference:
In the NCERT book, on page 60, both organ-level and organ system-level organization are mentioned in the table. However, it is crucial to understand the context and specific examples provided in order to determine the accurate organization level of platyhelminthes.

4. The Case of Platyhelminthes:
Platyhelminthes exhibit a relatively simple body structure compared to more complex organisms. They possess specialized tissues but lack well-defined organs found in higher organisms. Therefore, it can be concluded that platyhelminthes primarily show organ-level organization.

5. Tissue-Level Organization in Platyhelminthes:
Platyhelminthes have three primary tissue layers: ectoderm, mesoderm, and endoderm. These tissues are responsible for various functions such as protection, movement, digestion, and reproduction. However, they do not exhibit distinct organs formed by the combination of these tissues.

6. Lack of Organ Systems in Platyhelminthes:
Unlike higher organisms, platyhelminthes do not possess well-developed organ systems. They lack structures such as a circulatory system, respiratory system, or skeletal system. Instead, their body functions are primarily carried out by specialized cells and tissues distributed throughout their body.

In conclusion, platyhelminthes exhibit organ-level organization rather than organ system-level organization. They possess specialized tissues but lack well-defined organs and organ systems. It is important to understand the specific context and examples provided in the NCERT book to accurately interpret the information.