Final answer:
The Rhine River is the correct answer. The fertile soil and abundant rivers are important for successful farming. Farmers are attracted to this region because of the availability of water for irrigation and the fertile soil for growing crops.
Step-by-step explanation:
The Rhine River is the correct answer. The question is referring to the pull factors for farmers, which means the factors that attract farmers to a certain area. The fertile soil and abundant rivers are important for successful farming. The Rhine River flows through southern Germany and is known for its fertile soil and its role in transportation and trade. Farmers are attracted to this region because of the availability of water for irrigation and the fertile soil for growing crops.