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UNMSM · 2026

Ejercicio de Habilidad Verbal — UNMSM

TEXT 3

A new investigation suggests that samples of popular commercial dog foods contained “dangerous levels” of heavy metals, plastic contaminants, and acrylamide, a cancer-causing compound created when food is subjected to high heat.

Molly Hamilton, the executive director of Clean Label Project, the Colorado-based nonprofit which conducted the investigation, said over 85% of dog owners feed dry foods to their pets, and most dogs are eating one type of dog food every day, often for their entire life.

Dog foods contained three to 13 times more heavy metals than human food tested over the past decade, according to the report. The levels are similar to those found in prior research done by veterinarian Joseph Wakshlag, a nutritional specialist at Cornell University College of Veterinary Medicine in New York.

Dry dog food contained the highest levels of heavy metals and other contaminants, followed by air- and freeze-dried dog food. Fresh and frozen dog foods contained the lowest levels of heavy metals, according to the laboratory tests. The report did not release specific test results by brand or product name.

Studies show heavy metals can accumulate in the kidney and liver in a dog, potentially contributing to chronic disease. Exposure to lead and cadmium has been linked to canine cancer, a leading cause of death in dogs. About 1 in 4 dogs will develop cancer during their lifetime, according to the American Veterinary Medical Association. It recommends trying another brand periodically to add variety and potentially reduce exposure to contaminants.

Adapted from: LaMotte, S. (2026, 12 February). Commercial dog food contains ‘alarming’ levels of lead, mercury and other contaminants. CNN.

Which of the following statements is true according to the passage?

Ver solución paso a paso

💡 Idea clave: en preguntas de verdadero/falso sobre un texto, conviene contrastar cada alternativa con un dato numérico o afirmación explícita, para descartar las que alteran cifras o invierten la información.

  1. El texto indica que la comida para perros contiene entre 3 y 13 veces más metales pesados que la comida para humanos analizada en la última década.
  2. Eso hace verdadera la afirmación de que la comida para perros contiene, como mínimo, tres veces más metales pesados (A).
  3. B es falsa: el texto dice que 1 de cada 4 perros desarrollará cáncer, no el 50 %.
  4. C es falsa: el texto afirma lo contrario, que los alimentos frescos y congelados tienen los niveles más bajos de metales pesados.
  5. D es falsa: la recomendación de la asociación veterinaria es alternar de marca periódicamente, no usar siempre la misma.
  6. E es falsa: el reporte explícitamente no reveló los nombres de marcas o productos.

Respuesta: A) Dog foods contain at least three times more heavy metals.