Describe the specific relationship between a `commit` object, its `tree` object, and the `blob` objects for a single commit.

A `commit` object is a fundamental Git object that represents a specific point in the project's history. Each `commit` object stores essential metadata such as the author, committer, timestamp, and a log message. Crucially, a `commit` object also contains pointers, which are SHA-1 hashes, to its parent `commit` objects, establishing the project's history graph. Most importantly for this relationship, every `commit` object holds a single pointer to a `tree` object. This particular `tree` object represents the entire snapshot of the project's working directory at the exact moment that commit was made. It acts as the root directory for that specific version of the repository.

The `tree` object itself represents a directory within the project's file structure. Unlike a `blob` object, a `tree` object does not store file content. Instead, it contains a list of entries, where each entry corresponds to a file or a subdirectory residing within that `tree`'s directory. Each entry consists of a file mode (e.g., indicating a regular file, executable, or subdirectory), a name (the filename or subdirectory name), and a pointer, which is a SHA-1 hash, to another Git object. If an entry refers to a subdirectory, its pointer will be to another `tree` object. If an entry refers to a file, its pointer will be to a `blob` object. This allows `tree` objects to form a nested hierarchy that precisely mirrors the project's directory structure for that commit. The SHA-1 hash is a unique identifier generated from the object's content, ensuring data integrity and uniqueness.

A `blob` object is the simplest Git object, designed solely to store the raw content of a file. It contains no metadata such as filename, path, or permissions; it is purely the binary or text data of a file. The identifier for a `blob` object is its SHA-1 hash, which is calculated directly from its content. This design makes Git content-addressable: if two different files in the repository happen to have identical content, they will both point to the exact same `blob` object, saving storage space.

Therefore, the specific relationship for a single commit is a hierarchical chain. The `commit` object serves as the entry point, providing the metadata and a direct reference to its top-level `tree` object. This top-level `tree` object then acts as the root directory snapshot, containing pointers to all files (via `blob` objects) and subdirectories (via other `tree` objects) directly within it. Any `tree` object for a subdirectory similarly lists its own contents, either pointing to `blob` objects for files within that subdirectory or to further nested `tree` objects for deeper subdirectories. This recursive structure ensures that from a single `commit` object, Git can fully reconstruct the entire file system state, including all file contents (from `blob` objects) and their directory organization (from `tree` objects), exactly as it was at the moment of that commit.