pls explain the ans …...................................................

In facilitated diffusion, special proteins help move substances across membranes without the expenditure of ATP energy. While in the case of Active transport it uses energy to pump molecules against a concentration gradient.
In both cases, the transportation rate reaches a maximum when all of the protein transporters are being used (saturation).
So the correct option is 'One and three both'.

Please find the link below

https://www.askiitians.com/biology/transport-in-plants/

Regards