Which of the following best describes a straight ladder?

A straight ladder is best described as a single section, fixed length ladder. This type of ladder is characterized by its straightforward and rigid structure, typically made from materials like aluminum or fiberglass, and does not have the extendable sections that some other ladder types possess. Its fixed length makes it particularly useful for accessing low heights, providing stability and strength for tasks such as rescues or reaching rooftops.

Other options involve features not inherent to straight ladders. For instance, ladders with multiple sections that can be extended belong to a different category, often referred to as extension ladders, designed for reaching greater heights. Ladders primarily used for interior access often incorporate features such as wider bases or be designed for slip resistance, distinguishing them from standard straight ladders. Lastly, collapsible ladders, which can be retracted for easy transport, fall into another category entirely, focusing on portability rather than fixed structure. Thus, the defining characteristics of a straight ladder are best captured by its single-section, fixed length nature.