Answer :

The antifreeze protection level can be checked with an antifreeze hydrometer. Here's why:

1. An antifreeze hydrometer is a tool specifically designed to measure the freezing point and boiling point of the antifreeze solution in your vehicle's cooling system. It provides an accurate reading of the antifreeze concentration, which is crucial for protecting your engine from freezing in cold temperatures or overheating in hot conditions.

2. To use an antifreeze hydrometer, you would typically insert it into the coolant reservoir or radiator and draw some coolant into the tool. By reading the scale on the hydrometer, you can determine the freeze protection level of the antifreeze based on the specific gravity of the solution.

3. Checking the antifreeze protection level with an antifreeze hydrometer is an essential maintenance task to ensure that your vehicle's cooling system is operating effectively. It helps prevent costly damage to the engine due to overheating or freezing.

In conclusion, the correct tool to check the antifreeze protection level is an antifreeze hydrometer because of its ability to accurately measure the concentration of antifreeze in the cooling system.