Correct Answer: Endeavour

Solution : The correct choice is the third option .

Endeavour is a single word that encapsulates the idea of making a strenuous effort or working hard towards achieving a goal or completing a task, which is quite similar to what is given in the question.

The meanings of other options are as follows:

• Endanger : This means to expose someone or something to potential harm, risk, or danger.
• Hardworking : This is an adjective used to describe someone who puts in a lot of effort and diligence into their work or tasks.
• Indent : It refers to creating a space at the beginning of a line of text by starting it further from the margin.