Final answer:
The author argues that the danger in believing intelligence is fixed at birth is it limits one's potential, and this danger can be avoided by adopting the author's viewpoint of the importance of environmental stimulation and developmental factors.
Step-by-step explanation:
The danger in believing that one's intelligence is fixed at birth, as argued by the author in "Your Childhood IQ Does Not Define You," is that it can limit a person's potential and lead to a lack of effort and motivation to improve. By adopting the author's viewpoint in the essay, which emphasizes the importance of environmental stimulation and developmental factors, this danger can be avoided. The essay suggests that intelligence is not solely determined by genetics but can be shaped by a stimulating environment and supportive family, allowing individuals to reach their full intellectual potential.