How do I write a script to respawn a player when they touch a part?

First off you would want it so that it would fire off an event when something touches it

script.Parent.Touched:connect(function(part)

end)

Now you would want to check if the part that touched it was part of a player

getPlayer = function(part)
    local player -- nil
    for _, v in pairs(game.Players:GetChildren()) do
        if part:IsDescendantOf(v.Character) then
            --This will loop through the players and if it was a part of any of the characters then it will go here
            player = v --The current value
        end
    end
    return player
end

script.Parent.Touched:connect(function(part)
    local player = getPlayer(part)

    if player ~= nil then

    end
end)

Next we will want to make it so the player will respawn and add a debounce so it doesn't glitch out!

local db = false

getPlayer = function(part)
    local player
    for _, v in pairs(game.Players:GetChildren()) do
        if part:IsDescendantOf(v.Character) then
            --This will loop through the player and if the part was a part of any of the characters then it will go here
            player = v --The current value
        end
    end
    return player
end

script.Parent.Touched:connect(function(part)
    if db == true then return end --Stop running if debounce is equal to true
    local player = getPlayer(part)

    if player ~= nil then
        db = true
        player:LoadCharacter() --Respawns the character

        wait(0.5) --So it doesn't run the event multiple times
        db = false
    end
end)