In which life stage do humans start to talk, read, and
write?

In Stage 1 (initial reading, writing and decoding), typically between the ages of 6 and 7 years old, the child is learning the relation between letters and sounds and between print and spoken words.

Hope it helped!!!

In Stage 1 (initial reading, writing and decoding), typically between the ages of 6 and 7 years old, the child is learning the relation between letters and sounds and between print and spoken words

this is a good question! i'll do some research and come back when i have the answer!