An increase in the demand for labor may come about because of "an increase in the price of the good labor produces".
Labor demand is a term which is used in economics and it alludes to the quantity of hours of hiring that an employer is willing to do in light of the different exogenous (remotely decided) factors it is looked with, for example, the wage rate, the unit cost of capital, the market-decided offering cost of its yield, and so on.