Determine the Main Idea Sentence

Lisa knew all of the seven dwarfs except one. She remembered Grumpy, Sleepy and Bashful. And of course she couldn't forget Doc and Dopey. Dopey was her favorite. But there was one she just could not remember. Let's see. There's also Sneezy, and that's six. But she could not remember that last one. What was his name?

Native Americans dried strips of meat, pounded it into a paste, and then mixed it with fat. Sometimes they added berries and sugar. Then they pressed it into small cakes. They called these cakes pemmican. Pemmican didn't spoil, and it provided lots of energy for people traveling or going hunting. Today explorers still carry and eat this food.

Because lambs are sometimes eaten by coyotes, ranchers may hunt or trap the coyotes. However, killing coyotes may upset nature's balance. Scientists have found a way to protect sheep without killing coyotes. Coyotes are fed lamb meat treated with a drug. When they eat the meat, they get sick. Later, coyotes won't even go near lambs. They'll hunt rabbits instead.

Read the following portion of the article: The day finally came in 2009 while she was turning onto the freeway to go to work. Government officers stopped her and took her across the border to Mexico. They dropped her off that night in Tijuana. She had to start over but she knew no one. She tried to forge relationships and plan a new future but had trouble letting go of the U.S., the country in which she grew up. Every time she saw the border fence, just a few blocks from her apartment, her sadness returned. It felt “like someone poking at a wound,” she said. Then Landa found out about a new social movement of people like her who grew up in the U.S. but returned to Mexico. With their help, she took control of her new life and began to demand changes to both Mexican and U.S. laws. They call themselves “Los Otros Dreamers” — "The Other Dreamers." It's a reference to the "Dreamers," the name given to young people who are hoping to be allowed to stay in U.S. but are in danger of being kicked out because they are in the U.S. illegally. They hope that the Dream Act, a proposal that would allow some of them to become legal citizens, will be passed into law.

The Masai of East Africa raise cattle for a living. Very little grain is raised in the area, so the people depend on the cattle for food. Most people drink a gallon of milk a day, and beef is a popular meat. Cow's blood is also used as food. It doesn't spoil, it provides protein and minerals, and it can be taken from cows while traveling.