"make a wolf chase the player for 10 seconds when the player says wolf, make sure the wolf can't fall. add detailed comments, explanation and instructions"

-- server script (ServerScriptService) 
local function onPlayerChatted(player, message)
    if message:lower() == "wolf" then
        local wolf = game.Workspace.Wolf
        local humanoid = wolf:FindFirstChild("Humanoid")
        local pfs = game:GetService("PathfindingService")
        local path = pfs:CreatePath()
        
        local function chasePlayer()
            -- get the player's character and position 
            local character = player.Character
            if character then
                local targetPosition = character.HumanoidRootPart.Position
                
                -- compute the path for the wolf 
                path:ComputeAsync(wolf.HumanoidRootPart.Position, targetPosition)
                
                -- make the wolf follow the path 
                for _, waypoint in pairs(path:GetWaypoints()) do
                    humanoid:MoveTo(waypoint.Position)
                    humanoid.MoveToFinished:Wait()
                end
            end
        end
        
        -- make the wolf chase the player for 10 seconds 
        for i = 1, 10 do
            chasePlayer()
            wait(1)
        end
        
        -- reset the wolf's walk speed 
        humanoid.WalkSpeed = 0
    end
end

game.Players.PlayerAdded:Connect(function(player)
    player.Chatted:Connect(function(message)
        onPlayerChatted(player, message)
    end)
end)

-- Instructions 
-- 1. Create a wolf model in the Workspace and name it "Wolf".
-- 2. Make sure the wolf has a Humanoid and a HumanoidRootPart.
-- 3. Place this script in ServerScriptService.
-- 4. When a player types "wolf" in the chat, the wolf will chase the player for 10 seconds.
-- 5. The wolf will not fall off the map as it uses the PathfindingService to navigate.