Please help food and nutrition

so we know the answer cannot be c because no insect or animal starts as an adult

the answer is a. a swimming larvae

because since they are sea animals they automatticaly have to know how to swim they cannot just sink to the bottom

sorry if this is the incorrect answer.

the answer for this worksheet are the following:

1.            u

2.            e

3.            i

4.            o

5.            e

6.            h

7.            l

8.            e

9.            s

10.    y

11.    d

12.    e

13.    v

14.    r

15.    f

16.    r

17.    l

18.    c

then the given to crack is 6 12 3 9 15 1 17 7 10 14 8 18 4 13 2 16 5 11

the answer is he is fully recovered