They can share electrons. By sharing, they form a covalent Bond and that way atoms can be stable.
Cryosphere is the sphere that contains all of the frozen water on Earth. The correct option among all the options that are given in the question is the fourth option or the last option. Cryosphere is actually those parts of the surface of the earth where the water is in a frozen state, like in seas and oceans.
I would say your answer is B- Some of the chemical energy from the batteries is converted into heat energy.
The answer is :78 I think
KE=1/2 mv²
= 1/2 × 70 × (6)²
= 1260
