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Spongin is a modified type<span> of collagen protein, </span>forms<span> the fibrous </span>skeleton<span> of most </span>organisms<span> among the phylum Porifera, the sponges. It is </span>secreted<span> by sponge cells known as spongocytes. Spongin gives a sponge its </span>flexibility<span>.</span>
That which best explains the two categories of form and content is: B. Content is what is said and form is the way it is said.
<h3>What is content?</h3>
- Content refers to the information contained in a text. The information could be expository, entertaining, informative, etc.
- The form, on the other hand, refers to the manner in which the information is conveyed.
So, option B accurately describes the meaning of form and content.
Learn more about content here:
brainly.com/question/1159837
