Final answer:
Key signatures indicate the key of a musical piece. For the given options, 1) e flat major and 4) f major would be the expected keys based on the specific pitches mentioned.
Step-by-step explanation:
The question asks about key signatures. A key signature is a set of sharps or flats that appear at the beginning of a musical staff. It indicates the key of the piece. In the given options, 1) e flat major and 4) f major would be the keys you would expect to hear since they mention specific pitches (E flat and F). The other options, 2) flat major and 3) major, are not specific enough to determine the key.
The key signature indicates the presence of certain flats or sharps in a musical piece, providing a clue about the key of the composition. In the options provided:
E-flat major: This key signature includes three flats (B-flat, E-flat, and A-flat), and it is associated with the key of E-flat major.
Flat major: This description is somewhat unclear. If it means a key signature with flats, it would generally specify a particular key such as B-flat major, E-flat major, etc.
Major: Without further specification, this is too general to determine a specific key. Major keys can have different key signatures depending on the root note.
F major: This key signature includes one flat (B-flat) and is associated with the key of F major.
Therefore, the correct answer based on the provided options would be:
E-flat major