4. Once he had perfected the battery, he began to think of ways to improve the lives of the people in his community. One day a week, the government electricity would turn on in the village. The villagers had electricity to
power up devices and use their simple light bulb only four times a month. The rest of the month, they were in the
dark. Kelvin decided to make a bigger battery. He made a generator to power the homes in the village. Now, they
only have to turn on the generators enjoy the benefits of electric power.
DJ Focus
His Future Looks Bright

Read the fourth paragraph of the article and answer the following question
What central idea is presented in this paragraph?

1: He made a generator to power the homes in the village.
2: He began to think of ways to improve the lives of the people in his community.
3: The villagers had electricity to power up devices and use their simple light bulb only four times a month.
4: Kelvin decided to make a bigger battery.