Labour [?]

The number of employees leaving a company over a period of time is known as labour turnover. If the level of turnover is high compared with [?] years or other companies, then [?] will need to reduce this, as it [?] to costs in terms of recruiting, selecting and [?] new staff.

There are a variety of reasons why an employee [?] a company:
-he may find a new post with better pay or conditions in another business.
-he may be leaving the area because of a family [?].
-he may be [?] with his job because it [?] a motivating factor.
-he is at the end of his working life and [?].