3. This- These Este, esta, estos and estas are used to point out things (nouns) which are physically close to the speaker as well as to whomever he or she is speaking, usually within easy reaching distance. It corresponds to the English "this" or "these" and would be used under the same circumstances.
4. That- those Ese, esa, esos and esas are used to point out things (nouns) which are further away from the speaker (but not necessarily to the listeners), not within easy reaching distance. It corresponds to the English "that" or "those" and would be used under the same circumstances.
5. Thatoneoverthere- Thoseonesoverthere Aquel, aquella, aquellos and aquellas are used to point out things (nouns) which are far away from both the speaker and the listeners, but within visual distance. It corresponds to the English "that one (way) over there" or "those ones (way) over there" and would be used under the same circumstances.