A vector format, such as postscript or svg!
Vector formats do not use pixels and therefore can be scaled and zoomed without ever becoming pixelated. Note that when the logo is actually used (e.g., on a web-site), it will typically be rendered as a bitmap (e.g., PNG image) of a certain size (number of pixels).
Answer:
It is searchable. The address list is copied to the client. It contains the most recent information. There are multiple places to find email addresses.
They fall under the category of “Photo Editing Software” or “Image Manipulation Software”
It is false search engine are used for searching for something
I have know idea so I guess ask the teacher?