In which situation is Grid Search particularly useful?

Grid Search is particularly useful when the feasible space is large. This method systematically works through multiple combinations of parameter values, optimizing the selection process to achieve the best model performance.

In scenarios where the parameter space is extensive, using Grid Search allows for a thorough exploration of hyperparameters. Although it can be computationally expensive, this method assures that all conceivable combinations within the defined parameter grid are evaluated, leading to potentially improved model accuracy.

The other choices do not align with the strengths of Grid Search. For example, in situations where limited trials are available, or when the number of trials exceeds feasible points, one might need alternative approaches such as random search or Bayesian optimization, which can yield better results under those constraints. Additionally, Grid Search is generally not designed for locating local minima, as its primary function is to determine the optimal hyperparameter configuration rather than addressing optimization problems within the model training itself.