Re-write the sentence with the given words.
Sentence: It is necessary to save the environment
Words: Imperative, protect
It is imperative to protect the environment.
Complete the following task based on the instruction and optional input provided.### Instruction:
Re-write the sentence with the given words.

### Input:
Sentence: It is necessary to save the environment
Words: Imperative, protect

### Output:
It is imperative to protect the environment.