Question

space - age help for grandma
physical science studies: engineering design
researchers have been working to help astronauts get their balance back. astronauts need this help after spending long periods of time in space. researchers also used their work for a more earth - bound activity: they designed a shoe pad to help elderly people. it could help them by preventing falls.
question 8
what is the main idea of this article?
a. a student came up with the idea for the ishoe.
b. the loss of muscle strength can cause balance problems.
c. a device could help prevent falls in the elderly.
d. the ishoe records patterns made by the foots force.

Explanation:

El título del artículo "Space - Age Help for Grandma" y la descripción de un dispositivo (la almohadilla del zapato) diseñado para ayudar a las personas mayores a evitar caídas indican que el tema central es un dispositivo que podría prevenir las caídas en los ancianos. Las opciones A y D se centran en detalles específicos del diseño (un estudiante y cómo registra el zapato), mientras que la opción B es un hecho aislado (pérdida de fuerza muscular) que no es el tema principal.

Answer:

C. A device could help prevent falls in the elderly.