Answer:
B. False, it should read "The effects of many environmental factors change your phenotype, and as a result, they
can be seen."
Explanation:
The phenotype of an organism refers to the visible or observable characteristics of that organism i.e. phenotype can be seen. The phenotypic characteristics of an organism is controlled by its genetic make up/genotype in addition to environmental factors.
Hence, according to this question that states that The effects of environmental factors do not change your phenotype, and as a result, they cannot be seen." THE STATEMENT IS FALSE AND SHOULD READ "The effects of many environmental factors change your phenotype, and as a result, they can be seen."
Note: Not all environmental factors affect the phenotype