Help!! (This is science btw not Chemistry lol)

Electrical to Mechanical

Explanation:

As we know, Thermal energy keep's the body warm, Chemical comes energy from food molecules, and when the body moves, can be transformed into mechanical energy (aka, kinetic energy) when we're in motion.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

c. electrical charges of ionic bonds.