How to clone models on getting destroyed and respawn them?

Imagine there is a car,when it touches lava or falls from sky then how to respawn it to it's starting position..I know how to clone a model but don't know how to clone it to on its first point when it touches lava or falls from sky

Well, you should put the car instances in a specific model, (Like the model that the car's spawn is in) make a script that fires when a child is removed and make it check if the car model is still there each time a child is removed. If it's not there, it'll clone a car from anywhere you stored the car model in and then move it's PRIMARY PART's position to the spawn part's position. (You may need to weld everything in the car model.) Sorry but I'm too lazy to make a script about it.

This should do it.

local car = workspace.Car --change this into the car model you're using.
local backup = car:Clone()

function onCarDestroy(car, parent, CF, override) --if parent or CF or override are nil, the script will still run
	local newCar
	if override then
		newCar = car:Copy()
	else
		newCar = backup:Clone()
	end
	car:Destroy()
	if parent then
		newCar.Parent = parent
	else
		newCar.Parent = workspace
	end
	if CF then
		if newCar.PrimaryPart then
			newCar:SetPrimaryPartCFrame(CF)
			return newCar
		else
			error(newCar.Name.." has no PrimaryPart, no position set.")
			return newCar
		end
	else
		return newCar
	end
end

--all you need to do now is call onCarDestroy(car) when you are destroying the car.
--[[
ARGUMENTS:
	**[object; car]** > The model that will get destroyed and a new copy will be made.
	**[object; parent]** > [OPTIONAL] The parent of the new copy.
	**[cframe; CF]** > [OPTIONAL] The cframe the new copy will be positioned and rotated at, (The car must have a primary part for this to work)
	**[bool; override]** > [OPTIONAL] If true, the function will clone the first argument instaid of the backup, if cf is nil and override is true, the new copy will spawn on the same spot at the old car before it was destroyed. 
--]]

I've also put a description of the arguments the function takes, if you needed that.