Voiceless combinations of two consonants are called diagraphs. An example of this would be "st" or "ch". The opposite to this is a voiced combination that is called a blend.
There are more white keys on a piano than black keys.
A balloon about to pop because its so full of happines
I’m not sure the context, but it could be because Christmas is a family filled event that brings a lot of joy to people. A lot of people can relate to this event as well
Care is the correct answer