Bread is a kind of food that is baked in the oven. Bread is usually sold sliced, and you use the slices of bread to make sandwiches.
Bred is the past tense of breed. It is usually used to talk about animals who have been bred to look or behave a certain way, as in "this horse was bred to run fast".
Cis forComplicated
Something is complicated if it has a large number of interconnected parts or is difficult to understand.
The person in the picture is looking at some complicated machinery.