In which sentence do the subject and verb agree?

Vitamins and minerals isn't equally present in all foods.

A half of a grapefruit is waiting for me on the breakfast table.

Glossy green leaves and brilliant sunlight has created a beautiful scene.

The night air, soft and cool, were blowing in through the car window.

A half of a grapefruit is waiting for me on the breakfast table.

Here are the corrections from the other sentences:

Vitamins and minerals aren't equally present in all foods.

Glossy green leaves and brilliant sunlight have created a beautiful scene.

The night air, soft and cool, was blowing in through the car window.