I guess formal and informal refer to two types of essay - you can write a formal essay where you avoid conversational language and such and where you need to be very professional, or you can write informally where you don't have to think about such things, it is very casual.
The rescue team comforted the dolphin as they covered its body with wet cloth and an umbrella to prevent sunburn. Staff raised the animal's head to help it breathe, and moved it to deeper water inch by inch. The rescue process took seven hours as police, reserve staff and local fishermen joined hands.
<span>B.<span>referenced source material</span></span>
Answer:
Independent
Explanation:The clause can stand in its own.
