Trying to copy tool into players backpack but getting error?

I am trying to copy a tool in ReplicatedStorage into the players backpack when they touch the parent of the script which right now is just a normal part but I am getting the error Backpack is not a valid member of MeshPart and I don't know why. Here is the code:

function touch(hit)
    local copy = game.ReplicatedStorage:FindFirstChild("Tool")
    copy:Clone()
    local hum = hit.Parent:FindFirstChild("Humanoid")
    if hum~=nil then
        copy.Parent = hit.Backpack
        print("Tool Given")
    end
end
script.Parent.Touched:Connect(touch)