I don’t really understand what I’m supposed to be doing, I have to write a Psychology journal entry but the instructions are confusing

There are blank calories in a gram of carbohydrate

For my health class we were given a bunch of pictures of pregnancy tests for extra credit we have to say if they’re negative or positive. i can’t tell if this is a shadow or if it’s a faint positive

Causes of film fogging are a. secondary or scattered radiation exposure and outdated film. b. exposure of film to light during processing and solution splashed on the film before processing. c. movement of the patient and weak developing solution. d. incorrect placement of film and processing that's too long.