biology... i need help =( thank you.?

[Hi, Im Natalie.]

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1)Which shell shown in Figure 27–2 is from the most recently evolved organism?
A) A
B) B
C) C
D) none of them

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2)Which part of the squid shown in Figure 27–3 is analogous to a snail's shell?
A) A
B) B
C) C
D) D

3. The ________________ is a tongue-like organ with rows of teeth that is used by gastropods to scrape, grate, or cut food.

4. In bivalves, the ____________ expels large particles, sediment, and anything else rejected through the excurrent siphon.