What is a line? quotes

When given the brief, I was a bit confused over what it was we actually had to achieve. It was such a broad question, I thought I could take it in any direction. I chose to brainstorm ideas surrounding each quote we were given on the brief.

"A series of people, objects or things beside or behind each other"

I instantly thought of school photographs... people in lines... according to height. All looking so regulated. Photography in which there are clear lines.

This followed with chains of lights, fairy lights/christmas lights and all sorts of information/guidance lights such as cat's eyes in the road, street lamps and such.

And then with chains of mountain peaks, the way each seems to blend into another at a certain point creating a sort of natural zig-zag.

"A connected series of events, actions or developments"

My first thought for this seems quite obvious... metamorphosis, the change from a caterpillar to a butterfly... frog spawn, tadpole to frog... this could be a really interesting idea to work with.

This lead to the idea of time... timelines, or even a more literal approach with watch chains, clock handles.

I then thought of flip books, it shows an action in a quick succession of photographs. I could maybe use illustration for this one, turning a single line into different images.

"A mark indicating position, connection or boundaries"

On this one, I had more trouble, even though it was simple, to come up with any interesting ideas. I thought about the track lines in a swimming pool, separating the lines, the ones that float on the water. This could be interesting maybe with a stop motion film.

I then thought about road lines, a very easy approach to the quote, cycle lanes and such. I would like to come up with something more original I feel.

I then thought of the lines indicating where to cut on a page, the dashed track line with a widely understood scissor "cut here" symbol. This could be really interesting using photography, putting this line around general objects...