Answer:Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.
Explanation:
A. the existence of other galaxies
Answer:
B. Undernutrition
Explanation:
The reason why A. malnutrition is not correct is that malnutrition arises from lacking a few or one specific nutrient in your body.
Undernutrition arises because of inadequate intake of dietary energy regardless of specific nutrients.
While we use malnutrition in day to day use as an umbrella term for inadequate diets that is not the real meaning of that word.
