Its D the topic because the topic is always the main point
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>
Answer:
1. Whose house is this?
2. Which language you know?
3. He and his brother are students.
4. I have got a good job, didn't I?
6. She don't like horses?
8. Where are you from?
9. I never drink coffee in the evening.
10. when did you get up?
11. where does he live?
Explanation:
I had only written what I know. I hope it will help you
I am unable to understand the question
Answer:ignore this answer.
Explanation:
I’m just trying to get points
