Which pest directly impacts tomato plants as a leaf miner?

The correct choice is Liriomyza sativae, as this pest is a well-known leaf miner that specifically targets tomato plants, among other crops. Leaf miners are the larvae of certain fly species that burrow between the upper and lower leaf surfaces, creating distinctive winding trails or mines. This feeding behavior can lead to significant damage, including reduced photosynthesis, weakened plants, and increased susceptibility to diseases.

The other options represent different types of organisms or diseases. Fusarium oxysporum is a soil-borne fungus responsible for wilt diseases in various plants, including tomatoes. Hydrellia griseola is another type of leaf miner that affects certain crops but is less commonly associated with tomatoes compared to Liriomyza sativae. Pyricularia grisea, known for causing the rice blast disease, primarily affects rice and does not directly impact tomato plants as a leaf miner. Thus, the correct answer highlights the specific pest that is known for its direct damage to tomato foliage through leaf mining.