Final answer:
The three nutrition topics deemed 'essential' by the AMSA are macronutrients, micronutrients, and dietary guidelines.
Step-by-step explanation:
The three nutrition topics deemed 'essential' by the AMSA (American College of Sports Medicine) are macronutrients, micronutrients, and dietary guidelines.
Macronutrients refer to the three main nutrients that provide energy to the body: carbohydrates, proteins, and fats.
Micronutrients are essential vitamins and minerals that the body needs in smaller amounts for various functions.
Dietary guidelines provide recommendations for a healthy and balanced diet, including the recommended intake of different nutrients and food groups.