First, in this cartoon, the ingredients are basically given by nature. For example, the beast whose whole body melts on the tip of the tongue. Isn't this chocolate tree the same? Natural growth is also given by nature, otherwise, where to find such a strange tree. I don't agree with you. Although the name of this cartoon is called the prisoner of food, it doesn't mean that all the elements should be related to the prisoner.

Secondly, chocolate tree is also a kind of food. Although the naturally growing chocolate tree is unique, it can also be used as a food, and chocolate can also be used to make delicious meals. I think this is what the author meant when he arranged the appearance of this tree. After all, there are many possibilities in life. If the protagonist Lu in the play doesn't know innovation, how can he win the final victory?

Third. This chocolate tree is also needed for the plot. Every food hunter wants to finish his own menu, but there are many things that they haven't involved yet. One of them is cooking with chocolate. Imagine if someone's cooking ability has reached its peak in this play, what is the significance of the protagonist's growth. So I think the existence of this chocolate tree is also the need of the plot.

To sum up, every element in animation has its meaning of existence, and we'd better not ignore it. After all, the author has a big brain hole.