Demonstratives

Question 0

That (s)

Those (p)

Answer 0

Ese/a. Esos/as

Ese libro - that book
Esos libros - Those books
Esa pluma - that pen
Esas plumas - Those pens

Question 1

This (s)

These (p)

Answer 1

Este/a Estos/as

Este libro
Estos libros - these books
Esta pluma
Estas plumas

Question 2

That (over there)

Those (over there)

Answer 2

Aquel/la. Aquellos/as

Aquel libro - that book over there
Aquellos libros - Those books over..
Aquella pluma - that pen over there
Aquellas plumas - Those pens over..

Question 3

Demonstrative neuter form
(Dont change for Number or gender. Used to refer to abstract ideas, or to an unknown object)
This matter, this thing
That matter, that thing 
That matter, thing - over there

Answer 3

Esto
Eso
Aquello