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In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Kenya is the first country to protect elephants by text messages. Mobile phone SIM cards are inserted in the collars of elephants. The cards will send a text message when the elephants wander too close to farms, allowing wildlife protectors to drive them off rather than shoot them. Hungry elephants cause big problems for farmers and villagers in some parts of Kenya when they are searching for food. Two years ago the Kenyan wildlife service had to unwillingly shoot five elephants who continued to destroy crops. In order to prevent such bad activities, the Elephants charity put a mobile phone SIM card on a huge bull elephant called Kimani. The conservationists then set up a virtual fence. Each time Kimani came near the fence, a text message was sent to farmers. So far he's been stopped from going into the danger area fifteen times. The project seems to be working successfully as Kimani hasn't come near a farm for four months. A similar system has now been put into operation in another part of the country. One of the biggest benefits of the project is that elephants seem to learn from one another, which can help a whole group change their habits. The elephants can also be tracked using Google Earth software. This is also helping the protectors know where to use their resources to protect the animals well.
Answer: they are hungry
Output:
Elephants often cause problems in Kenya, because _ .