Some types take more hits to defeat then others, and some have special abilities. Although they are called rows, some stages have groups of tiles that create rows with turns. They also effect things like drilling time, zombie speed, ect. are all types of ground that require special things to build on. The Terrain of a level also effects the ground type water, soft soil, rock, slanted grass, sand, ect. However, certain types of Plants and Zombies can move or attack on rows other then their own. Most Plants attack only Zombies on that row, and most Zombies only walk foward on their starting fow. The playing field is typically split into various amounts of tiles, which create a row. This prevents someone placing larges amounts of cheap Plants quickly. After a Plant has been placed, even if you have enough Sun for another, you must wait for it to recharge before placing another of the same kind. Each Plant costs a certain amount of Sun to place at first Sun falls from the top of the screen, but then the player can place Sunflowers or other plants to increase the rate of Sun. The game, as explained above, is an action-adventure 3D tower-defense game thus, the goal is to place units, in this case Plants, to stop the Zombies.

3.3 Instant Mower Active Deployation (I.M.A.D.).

Plants vs zombies 2 3ds