Answer:
All of these infant traits can influence their care-giving environment and personality development.
Explanation:
Genotype is the genetic constituent of the individual whereas the phenotype is the physical constitution or physical appearance of the individual. The genetics studies these inheritance patterns of the phenotype and genotype.
Some traits are completely determined by the genotype of the individual. But some traits are also influenced by the environmental factors as well. The phenotype of the individual in this case depends on both the genotype as well as on the environmental factors that can influence the personality development as well.
Thus, the correct answer is option (a).
I don't believe dyslexia is a born disorder, and can be developed at any stage of life, given the circumstances leading to the development. It doesn't occur out of the blue, there is always a reason for the development of a learning disorder. I would not jump to the conclusion that you have dyslexia, though. It is simply a possibility. Other reasons your reading and writing could be affected includes lack of sleep, hormone rampages, environmental changes, etc. etc.