The correct identification of ways that earthquakes and tsunamis can cause destruction is:
earthquakes: landslides tsunamis: open up large cracks in Earth’s crust
This is because earthquakes can trigger landslides and ground shaking, while tsunamis can indeed cause significant changes to the land, including the potential for large-scale erosion and alterations in coastal geography. However, tsunamis are less commonly associated with opening up cracks in the Earth's crust compared to the effects of earthquakes themselves.
Still, among the options provided, the combination with landslides as the effect of earthquakes is more accurate than the others.