To secure a wooden object to a concrete wall, which of the following types of fasteners is recommended?

Masonry nails are specifically designed to penetrate hard surfaces like concrete. They have a hardened, durable design that allows them to drive directly into masonry without requiring a pre-drilled hole, which makes them ideal for securing wooden objects to a concrete wall. Their ability to create a strong bond is crucial in ensuring that the wooden object remains securely attached, even under stress or load.

In comparison, wood screws are meant for fastening wood to wood and may not grip well in concrete. Drywall anchors are used for attaching items to drywall and would not provide adequate support in a masonry context. Plastic plugs, which are typically used with screws in softer materials like drywall, also would not offer the necessary strength or reliability for securing wood to concrete. Thus, masonry nails are the best choice for this application.