I think it is c or build muscle strength
Hamburger becuase you cook it on a grill and then you put it in a bun. You can add pickels, cheese, mayo, ketchup, and pretty much anything to it.
i hope im right
The main factors affecting birth are:
Age.
Health.
Heredity.
Ovulation cycle.
Location.
Miscarriage
Answer:mental life; observable behavior
Explanation: Mental life has a lot to do with how psychologists focus more on the physiological research in the 1920s and 1960s, but as times goes by, they emphasize more on observable behavior. Because both mental life and observable behavior work together for a good psychological result.
