In Table 1, demonstrative pronouns are identical to the demonstrative adjectives. However, you may see an accent on the stressed syllable to distinguish the demonstrative pronoun from the demonstrative adjective. The accents are optional for the demonstrative pronouns.
When a demonstrative pronoun refers to an idea, situation, or concept, the appropriate neutral demonstrative pronoun is used. Since neutral demonstrative pronouns do not replace a specific noun, but rather refer to general ideas or concepts, they do not need to represent any gender and there is only one form. Notice in Table 2 that the neutral pronouns never have accent marks.
Here are some examples:
Eso es lo que te dije.
That is what I told you.
Mi niñez (Aquello que me pasó me trae tantos recuerdos.)
My childhood (That which happened to me brings back so many memories.)