What type of knot is commonly used to secure a line to an object?

The bowline knot is a highly regarded choice for securing a line to an object due to its ability to create a fixed loop at the end of the rope. This characteristic is particularly useful in various applications, such as rigging and rescue operations, where a secure, non-slipping loop is needed. The bowline is easy to tie and untie, even after bearing a load, which makes it practical for repeated use in theatre rigging and other settings.

In contrast, while the square knot is often used to tie two lines together, it does not create a loop and is less reliable under load. The clove hitch, although effective for temporarily securing a line to a cylindrical object, can be prone to slipping under certain conditions. The sheet bend is primarily used to join two ropes of different diameters and does not provide the same functionality as the bowline for securing a line directly to an object. Therefore, the bowline is the superior choice for this purpose.