Which sentence uses the present verb tense?

The sentence "He cuts the grass" is in the present verb tense, indicating an action that is currently happening or is a habitual action. This sentence suggests that he regularly performs the action of cutting the grass, which reflects an ongoing or repeated situation in the present rather than a completed action or a future intention. In English, the present tense is used to describe actions that occur at the moment of speaking, general truths, or habits, making this option the correct choice.

The other sentences mention actions that are either completed or planned for the future, which differentiates them from the present tense usage in the selected answer. For instance, "They walked to the park" describes an action that has already happened, while "We will go to the store" indicates a future plan. Similarly, "I had dinner" refers to a past event, marking a distinct time frame from the present.