How successful is Jack in the second hunt and who is the one who helps Ralph build all the huts? What conflict arises between Jack and Ralph?

In his hunt in this chapter, Jack once again is not able to kill a pig.  He does throw a spear at one, but misses.

In the meantime, Ralph has been trying to build huts.  Simon is the one who has been helping them.  Like Jack with his hunt, the boys have not been all that successful in building the huts.

When Jack comes back from the hunt, he and Ralph get into an argument about hunting.  Ralph wants Jack and his group to do more to help with things like building huts -- responsible stuff, in his opinion.  But Jack wants to hunt because that is more in his nature.