* Needs: This is the most common and general translation. It signifies a requirement or something essential. For example, "La planta necesita agua" (The plant needs water).
* Requires: This translation is more formal and suggests a stronger necessity. For example, "El trabajo necesita experiencia" (The job requires experience).
* Has to: This translation implies an obligation or compulsion. For example, "Él necesita ir al doctor" (He has to go to the doctor).
Therefore, the best translation of "necesita" will depend on the specific context and the nuance you want to convey.