Which of the following is a method for tenderizing meat?

Marinating is an effective method for tenderizing meat because it involves soaking the meat in a mixture of acidic ingredients, such as vinegar, citrus juice, or yogurt, along with various seasonings. The acid in the marinade helps to break down the protein fibers in the meat, making it more tender and flavorful. Additionally, marinating often includes oils and herbs that further enhance the meat's taste and moisture content.

In contrast, boiling typically cooks meat quickly but does not necessarily affect its tenderness in a favorable way; it can, in fact, lead to tougher textures if overcooked. Freezing meat is primarily a preservation method that can sometimes affect texture, but it does not actively tenderize. Grilling involves high heat which can create a nice crust but does not inherently make the meat more tender compared to the method of marinating.