Thank you so much for your comment
But , for the first question,I think Axel was obliged to go with his uncle and we saw how frightened he was and tried hard to convince his uncle to give up the journey in many situations. Unlesshe had felt sorry for his uncle...........
....I agree with you but why did he agree ?He agreed to prove his bravery when Gropn told him that it would be fantastic to go on such a journey? ( the authentic text )

for the the second item , We can say that he was obliged to be brave when his uncle asked him to be so
for the the third item you 've caught me wrong
thank you again

but some biscuits and apiece of meat

انا مع الرأي
biscuits and meat