It means: He/she/you need
"Usted necesita ayuda" means "You need help" in Spanish.
"Necesita mas besos" translates to "needs more kisses" in English.
It doesn't need refrigeration.
No se pero necesita hablar con usted gracias -I don't know but he/she needs to talk with you, thanks. (If it said 'necesito', it would mean 'I need to talk etc.')
Mi hija necesita ayuda en espanol OR Mi hija necesita ayuda en la clase de espanol (I assume you mean spanish class at school)
This phrase translates to "Juan needs to sleep because he is tired".
The woman buys eggs but she doesn't need them
You are one that needs help.
las necesidades (it is a feminine noun) If you mean it as a verb (he/she/it/needs....), then: el/ella/ello necesita.....
formal (to older person): "usted necesita" informal: "tu necesitas"
necessary. you need.
it means: he/she needs