.img-fluid to ensure that images scale with the parent element.
.content sections automatically inherit this style, ensuring that they scale to fit the content area.
If you float an image to the left or right within the content of an article, the rest of the content will flow around it. Use responsive variants of the float utilities if you want to have the images only float to one side on certain screen sizes.
Block-level images can be aligned using margin utilities.
.ml-auto were used in the example above, the image would float to the right-hand side.