Jason is reading a great mystery novel where the author keeps dropping hints as to what might happen next – but he never comes out and just states it. what literary device is the author using?

I'm pretty sure your answer should be Foreshadowing. (A literary device in which an author drops subtle hints about plot developments to come later in the story). Hope this helps! =^-^=

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.