Only once ventilation has been achieved is the firefighters attempt to enter a structure when backdraft conditions are present.
<h3>What is the meant by ventilation?</h3>
In the workplace, ventilation is used to reduce exposure to airborne contaminants. It is widely employed to purge the air of contaminants like fumes, dust, and vapours in order to produce a secure and healthful working environment.
The alveoli are responsible for converting carbon dioxide from the atmosphere into oxygen.
Thus, Only once ventilation has been achieved is the firefighters attempt to enter a structure.
For more details about ventilation, click here:
brainly.com/question/11471552
#SPJ4
Answer:Sumerian farmers' invention of the plow helped them provide their city-states with a stable food supply. Before farmers invented the plow, they used animal horns or pointed sticks to poke holes in the earth.
Explanation:
Answer:
A. The demand for labor increases faster than the supply of labor.
Explanation:
When the demand for labor increase faster than the supply, the employees will have more options to choose and the employers have to compete with other employers in order to obtain them.
This will make the employers raise the wages/salary that they offer in order to attract the employees and cause an increase in the equilibrium wage.
