Question

what indicates that an area in the northern hemisphere is experiencing summer?
the sun is at its lowest point in the sky.
the north end of earth is tilted toward the sun.
the northern hemisphere receives fewer direct rays from the sun.
the northern end of earths axis is tilted away from the sun.

Explanation:

The Earth's tilt causes seasons. When the north end of Earth is tilted toward the Sun, the Northern Hemisphere gets more direct sunlight, which is characteristic of summer. When the Sun is at its lowest point in the sky (in the Northern Hemisphere), it's winter. Fewer direct rays from the Sun would mean less heat, which is not summer. Tilted away from the Sun (Northern Hemisphere) is also winter.

Answer:

The north end of Earth is tilted toward the sun.