TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: As pictured below ( Figure below ), some grazing animals, especially sheep and goats, eat grass right down to the roots. They may even pull the grass entirely out of the ground. Grazing animals can kill the grass. They may thin it out so much that it offers little protection to the soil. If animals are kept in the same place too long, the soil may become completely bare. The bare soil is easily eroded by wind and water. Answer: erosion

SOLUTION: By pulling out grass by its roots and over-grazing, livestock contribute to what negative process?

PROBLEM: Passage: Resistance is the property that determines the amount of current flow through a particular material. Answer: resistance

SOLUTION: What is the property that determines the amount of current flow through a particular material?

PROBLEM: Passage: Perhaps you have eaten too much pizza and felt very uncomfortable hours later. This feeling is due to excess stomach acid being produced. The discomfort can be dealt with by taking an antacid. The base in the antacid will react with the HCl in the stomach and neutralize it, taking care of that unpleasant feeling. Answer: neutralize it

SOLUTION:
The base in an antacid reacts to do what to excess stomach acid?