Answer:
nature and nurture are both influential
Step-by-step explanation:
Mike and Nicola have assumed that if they the trait of liking reading their child would also like reading. There is a high chance of this happening as they both have this trait. However they do not take this for granted.
They make sure that the environmental factors are such that it will inculcate the child's interest towards reading. He is given exposure to all aspects of reading.
Hence, the parents believe that nature and nurture are both influential in developing a trait.