How are the process of fertilisation in sea urchins and in humansIn what way are they different?

Fertilization in sea urchins typically occurs externally, where eggs and sperm are released into the water and fertilization happens outside the female's body. In contrast, humans undergo internal fertilization, where sperm is deposited within the female reproductive tract, leading to fertilization inside the body. Additionally, sea urchins produce a large number of eggs and sperm to increase the chances of successful fertilization, while humans have a more controlled reproductive process with fewer offspring. These differences reflect adaptations to their respective environments and reproductive strategies.