Often a woman will have a light period if she has either too much or too little body fat. If that's not the problem, check with your doctor.
It creates our periods of night and day as the Sun's light travels across the Earth's surface.
The rotation. When the earth rotates, sides of it don't see the sun. Which are like sunsets and sunrises. The earth is rotating which takes away light and gives light.
the tilt of the earth's axis
periods
Dry periods of time causes lost of planting areas
No.
my periods was 6 weeks late and i light periods could i be pregrant
Irregular menses can have multiple causes. You should check things out with your doctor.
Butt
if you are pregnant it can cause you to miss some periods
photoperiodism
No