Final answer:
The answer to the question is option 3) Sea Fan and Brain, as these are types of soft coral. Elkhorn and Staghorn corals are hard corals, while Black and Red corals belong to a different order.
Step-by-step explanation:
The correct answer to the question "Two examples of soft coral are" is Sea Fan and Brain corals. Soft corals are a type of coral that lacks a rigid calcium carbonate skeleton like their hard coral counterparts. A notable feature of soft corals is their ability to flex and sway in the currents, providing a distinctively dynamic form of reef life. They often grow in a variety of shapes and colors, contributing to the biodiversity of coral reefs. Elkhorn and Staghorn corals are examples of hard, or stony, corals from the order Scleractinia, so they are not considered soft corals. Similarly, Black and Red corals are also not soft corals; they are from a different order, the Antipatharia. Therefore, the correct answer for soft coral examples is option 3) Sea Fan and Brain.