Which drivetrain type allows all wheels to push and pull the car simultaneously?

All-wheel drive is the drivetrain configuration that enables all wheels of the vehicle to receive power simultaneously, thus allowing them to push and pull the car together. This system is designed to enhance traction by distributing engine power to all four wheels as needed, which is particularly beneficial in various driving conditions such as rain, snow, or off-road scenarios.

In contrast, rear-wheel drive and front-wheel drive systems only power either the rear wheels or the front wheels respectively. This means that only part of the vehicle has the capacity to propel it forward, which can be less effective in maintaining traction compared to all-wheel drive. Manual drive is not a drivetrain type, but rather refers to a transmission system where the driver manually changes gears. Therefore, all-wheel drive is the correct answer as it provides the advantage of improved handling and stability by utilizing all wheels simultaneously.