Answer:
krypton,radon, and silicon
Answer:

Explanation:
We know that the speed of light is equal to 
We need to find how far the light travel in 3 days.
Speed of an object is equal to distance covered divided by time taken.
Also, 1 day = 86400 s
3 days = 259200 s
So,


So, the light will travel
in 3 days.
You have to start listing from the bottom :
3. Secondary Consumers
2. Primary Consumers
1. Producer
I would think conductor since it absorbs heat and which is radiation but that's not the question and the heat it absorbs it touches the food which is conduction