Answer
a.) Independent
b.) Dependent
c.) Dependent
d.) Independent
Work Step by Step
a. Having a long shoe and IQ are not related hence independent.
b. A daughter can be left handed if the father is left handed due to hereditary reasons.
c. Lung cancer has been linked to smoking hence dependent.
d. Eating an excessive amount of ice cream and smoking an excessive amount of cigarettes are not related to each other