What are some of the ways in which you can keep the horizon straight when taking a photograph?

1. What is aperture priority mode? When might you use this mode on a camera?

Aperture priority mode is when hole size matters more than anything else. You use it when you want to use the hole size you want.

2. What is depth of field? How can you adjust the depth of field in a photograph?

DOF is the distance between clear objects. You adjust DOF by making sure distance of objects will make them clear.

3. What is the relationship between aperture and shutter speed? How can you describe this relationship?

Their relationship is mutual understanding. More like Brad Pitt and Angelina Jolie rather than Chloe Kardashian and Lamar Odom.

4. What is the landscape mode? How does this mode adjust the aperture? What is the result of this adjustment?

Landscape mode is the mode you use when you shoot land and escapes. It adjusts aperture positively. The results are good.

5. How is shutter speed generally measured? What do the measurements mean?

Shutter speed is generally measured in light years signified by the scientific symbol "s". It means the measurements in "s" is the reciprocal of the number when the denominator is put on the numerator side instead.