Answer:
Are invertebrates
Step-by-step explanation:
In the given question, the diagram has not been provided and is not found anywhere therefore the question can be answered based on the previous knowledge. A Venn diagram is a logical diagram which is made to see the relationship between any two sets of items.
In the given question, the X is present in the middle part of the diagram which represents the common characteristics between the Cnidarians and sponges.
Both Cnidarians and the sponges are the invertebrate species as they lack backbone or vertebral column in their anatomy. The Cnidarians are sexually reproducing species whereas the sponges can reproduce sexually as well as asexually.
Thus, the selected option is the correct answer.