Why do the crew memebers agree to to kill helios' cattle?

They are afraid of starving to death.

hope this helps :)

Explanation:

1.  The enzyme dicer cleaves dsRNA to form

small interfering RNA (siRNA).

2.  The siRNA binds to a special protein,  

which degrades one strand.

3. One strand of siRNA associates with the

protein to form an RNase complex.

4. The RNase complex binds to a specific

mRNA and degrades it.