He spent the evening reflecting on the day's events. What does "reflect" mean?

She hired a lawyer who specializes in divorce cases. What does "specialise" mean?

What does "supervisor" mean?

The children are very attached to their grandparents. What does "attached" mean?

What does "conservation" mean?

Fitness apps can help people to deceive themselves about how healthy their lifestyle is. What does "deceive" mean?

It seems more sensible if we research the market before planning a project. What does "sensible" mean?

Keeping a fitness diary helps people to eat well and exercise not for the sake of meeting the app’s artificial targets, but because exercise makes everyone feel, look and be better. What does "for the sake of" mean?

What is the synonym of "essential"?

If the attractive design of a device or app encourages an interest in keeping fit, its impact is clearly positive. What does "encourage" mean?

Sports scientists agree that people need to be aware of the fact that apps alone are not enough. What does "aware" mean?