Read the passage and answer the question.
The ostrich is the largest bird in the world, but it cannot fly. Its legs are so strong and long that it can travel faster by running. Ostriches use their wings to help them gather speed when they start to run. They also use them as brakes when turning and stopping.
Ostriches have been known to run at speeds of 60 miles per hour. So, they can run faster than horses and match the average speed of car drivers on a highway.
These huge birds stand as tall as horses and sometimes weigh as much as 298 pounds. In North Africa, they are often seen with other larger animals.
The zebra, which is also a fast runner, seems to be one of their favorite companions.
An ostrich egg weighs one pound, which is as much as two dozen chicken eggs. Ostrich eggs are delicious and are often used for food by people in Africa. The shells are also made into cups and beautiful ornaments.
Which detail from the passage supports why the ostrich travels faster by running?
Read the passage and answer the question.
Which statement supports the author’s opinion that their Alaska vacation was miserable?
In the United States today, we are starting to see more and more of a problem with children who are overweight. Doctors and even the President's wife are trying to do something about it. Not only are they recommending healthier foods, but they are also recommending that children get daily exercise. They suggest that children go outside and do things instead of sitting in front of the tv. They have suggested that children get at least an hour of exercise a day by doing things like jumping rope or cycling, or anything else that makes their heart beat faster. This kind of exercise is known as aerobic exercise. They also recommend that children do exercises that strengthen their bones and muscles. There are lots of ways children can do this, especially through running.
According to the passage, what is the name of the type of exercise that causes the heart to beat faster?