Final answer:
Boys typically begin to get erections, develop seminal fluids, ejaculate, and experience "wet dreams" around the ages of 12 to 16 years old (option b). The changes associated with puberty can vary among individuals but usually start with testicular growth and continue with further sexual and physical development.
Step-by-step explanation:
Sexual Development and Puberty in Boys
Puberty in boys typically involves the development of reproductive capabilities like erections, production of seminal fluids, the ability to ejaculate, and experiencing “wet dreams.” These changes usually begin around the ages of 11 and 12. The first ejaculation occurs by the age of 13 years, and boys may experience “wet dreams” or nocturnal emissions as part of normal sexual development. Full fertility, including the presence of sperm in semen, may not occur until a year or two later, but boys are generally able to reproduce before their growth is completely finished.
As boys enter puberty, the testes and scrotum begin to grow, which is typically the first sign of puberty. Along with these changes, secondary sex characteristics such as pubic hair and facial hair emerge, and the voice deepens. The growth spurt in males happens later during puberty, around the age of 11 to 13, and height can increase significantly during this period. The onset and pace of puberty can vary greatly among individuals, but development often continues through the early 20s.
Therefore, the correct answer to the question “At what age do boys begin to get erections, develop seminal fluids, ejaculate, and experience “wet dreams”?” is b) Approximately 12-16 years old.