Find out the appropriate word(s) and fill blank (iv).

Directions: The following passage has some blanks, each of which has been numbered.

There are two ____ (i)____ sources of energy, renewable and non-renewable. ____(ii)____ electric power is a major energy source. This is electricity generated by turbines turned by water. Solar energy is energy ____(iii)____ from the sun. Sun is a very important energy source. Renewable energy sources are clean and ____ (iv)____. They can be ____ (v)____ too