What can draw you into a picture of a prairie landscape?
lines
no clear focal point
a shallow depth of field
all of the above

The answer is All of the above

Explanation:

The landscape picture is one of the most versatile genres in painting. It was one of the last professorships to be fostered in the first art academies and it incorporated techniques that were unusual in traditional genres, like nobles portraits, historical battles or even in religious/profane themes.

The first samples of landscape art was founded in Ancient Greek’s Frescos, from the Minoan Greece Period (around 1500 BCE). We refer to Landscape to any painting or photograph with humans' absence or when they have a secondary role in the picture. In Ancient China they were present as well, and even in the Middle Ages, many landscapes were made.

But not until the XVII and XVIII centuries the landscapes have got popularity in Western World. One of the factors were the ones made by the Dutch painter Frans Post, who was present in the scientific explorations in the New World, mainly to Brazilian Forests. He used watercolors as a technique, something that was revolutionary as well.

And this revolutionary aspect of landscapes was decisive to Romanticists Artists to adopt them as a technique to be explored. And the results of their experiments in the landscape genre became the fundaments of its teaching that was incorporated in Academy afterward.

As it isn’t centered in the human figure, landscape painting can widely broach the mental work of the artists. It’s possible to add different sources of light, present in the real world. That’s why the Impressionists and Neo-Impressionists carried on that tradition that later was incorporated into photography.

As the praires are a vaste portion of flat land, the changes of light caused by clouds or sun/moon position are possible to be depicted. Lines and no clear point will depend on your inspirational background. If you’re inspired by the Impressionists’ brushstrokes, lines and focus may not be present.