Hydrogen bonds form between molecules containing bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially charged atom of another.
a. polar covalent; negativelyb. polar covalent; positivelyc. nonpolar covalent; positivelyd. nonpolar covalent; negativelye. ionic; positively

The answer is A. Polar covalent; negatively

Explanation:

Hydrogen bonds form between molecules containing polar covalent bond the hydrogen bond is been a hydrogen atom of one molecule and a partially negative charged atom of another.

Example (water):- It contain a slight positive charge on one side and a slight negative charge on the other.

where's the diagram?

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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