Can someone help mee please

1 . A bond is attraction between atoms, molecules or ions.

covalent and ionic bonds are main kinds of bonds

I still don't know why some bonds are weak and some are strong.

2. Wax is a byproduct of petroleum refining. Candle wax can also be made from beeswax (a byproduct of honey collection), gel (a mixture of polymer and mineral oil), or some plant waxes (generally palm, carnauba, bayberry, or soybean wax).

c. magnitude and direction

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.