Which answer accurately explains the cause and effect relationship between advances in agriculture and urbanization during the bronze age?

I don't know your options, but there is one clear cause and effect relationship between the two:

As the agricultural methods advanced, people were more productive creating food. This means that not everyone had to engage in farming! And this allowed specialization for other jobs, just as smiths, which typically live in the cities.

To relate to humans in a relational humanly way.