Question

the human body needs iron to produce hemoglobin, a substance that helps red blood cells transport oxygen. without enough iron, a person may feel tired and weak. dietary sources of iron include plant sources, such as vegetables and beans, and animal foods, including poultry, red meat, and fish. however, plant and animal sources are not equal. the iron in plants, called nonheme iron, is not easily absorbed by the human digestive system. for example, a half cup of cooked spinach contains a healthy dose of over three milligrams of iron. unfortunately, only five percent of that iron can be used by the body. on the other hand, the iron in animal foods, called heme iron, is better utilized. heme iron is contained within a ring of protein, which helps the body to absorb it easily. what is the main, or central, idea of the passage? plant and animal food sources both contain iron, which helps red blood cells carry oxygen throughout the body. heme iron, found in meat and fish, is easily absorbed by the human body. plant and animal food sources both contain iron, but the iron in animal foods is more accessible to the body.

Explanation:

El texto explica que hay dos tipos de hierro: el hierro hemo (en alimentos animales) y el hierro no hemo (en alimentos vegetales). El hierro hemo es más fácilmente absorbido y utilizado por el cuerpo. Además, se menciona que los alimentos de origen animal (como carne, pollo, pescado) contienen hierro hemo, mientras que los vegetales y legumbres contienen hierro no hemo, que no es tan accesible para el cuerpo.

Answer:

El texto principal de la pasaje es que hay dos tipos de hierro (hemo y no hemo), que el hierro hemo (en alimentos animales) es mejor absorbido y utilizado por el cuerpo, y que los alimentos de origen animal y vegetal contienen hierro, pero con diferentes niveles de accesibilidad para el organismo.