Final answer:
The correct answer is that the question does not provide enough information to determine if the extra-finger trait in Steven's family is inherited or environmentally induced. We need more context to assess whether heredity or environmental factors are responsible for this trait.
Step-by-step explanation:
The correct answer to the question is (c) The question does not provide enough information to determine if the trait is inherited or environmentally induced. While certain characteristics, like the extra-finger trait mentioned, may be genetic in nature, without specific evidential context from the question, we cannot definitively state whether this trait in Steven's family is a result of heredity or environmental factors.
It's crucial to understand that although we are born with a certain genetic makeup, the environment plays a significant role in the expression of these genetic traits, a concept known as epigenetics. Variations in phenotypes (observable traits) can stem from a complex interplay between genes and the environment, as demonstrated by the influence it can have on a variety of traits including physical attributes, intelligence, and behavior.