Answer :
esta selva es muy verde.
esos cerdos son muy sucios.
esas chicas son alumnas.
esos cerdos son muy sucios.
esas chicas son alumnas.
For this case we have the following demonstrative adjectives:
1) This
2) Those
The translation of these adjectives in Spanish is different depending on whether the gender is male or female.
For the male gender we have:
This = Este
Those = Esos
For the female gender we have:
This = Esta
Those = Esas
Using these definitions, we can complete the sentences:
Esta selva es muy verde. (This).
Esos cerdos sons muy sucios. (Those).
Esas chicas son alumnas. (Those)