Energy transformations that involve one transformation from one type of energy to another are .

It is called single transformation

Single transformation

Explanation:

Energy can neither be created nor be destroyed, it can only covert from one form to another. Sometimes, to get a work done one form of energy only require to be transformed into another form then it is known as single transformation.

For Example, cell phone transforming electrical energy into electromagnetic energy that makes it's working feasible.

Moving vehicle converting chemical energy to kinetic energy.

1 a

2 b

3 b

4 d

5 d

6 d

explanation:

frequency or wavelenth of em radiation in a vacuum