In French, the word collage means

Collage came to English through French from the Greek word for glue, kolla, about 100 years ago. ... A collage is not only made from magazine pictures. In the world of fine art, it refers to a work made with various small objects sometimes with paint sometimes without.

Explanation:

In French, the word collage means to glue.

Explanation:

A collage is a form of artwork arranged from cut out or torn material pasted onto a surface.

lines and shapes are a part of the visual elements which can be played with and used to create a mood or feeling in a composition.

some of the other elements include the pattern, color, tone and texture. all these elements serve together as the construction blocks which are used by the artists to create artwork.

lines are used to form drawings and different shapes are formed when these lines are used in certain lengths or angles. so the artist can play with these elements of art to create and express different moods, thus conveying different  meanings.