I think it’s how they are inside and get stuck
Energy input would be what's giving the source energy. Energy output is what energy it's giving out.
Answer:
The correct option is;
Protein
Explanation:
Stress proteins are the class of proteins used to mediate cellular stress response. There are two types of stress proteins including the stress activated proteins and the dual functioning, stress response and cell function protein. By being a primary source of survival of cells under stress has resulted in the conservation and associated existence of the similar stress proteins in different classes of living organisms.
Answer:

Explanation:
The distance to the Sun is 5,890,000,000,000. We need to write this distance in km.
A number can be written as
in scientific notation where x is a real no and y is any integer.
There are 10 zeros in the given number and also there are 12 digits after. It would mean that,

So, the distance in scientific notation is : 
I would say D because it involves more selection but if that one is wrong it is most likely B. But I would go with D