Answer:
Shirt becomes negatively charged and Kelvin's body becomes positively charged.
Step-by-step explanation:
An electron is the elementary particle of atom. It has a negative charge of - 1.6 x 10^-19 C.
If a body loses some electrons, it becomes positively charged and if the body gains some electrons then it becomes negatively charged.
According to the question, cotton has higher tendency to attract the electrons, it means it has a tendency to acquire negative charge.
If Kelvin pulls his cotton shirt the electrons get transfer from his body to cotton shirt. It means the cotton shirt acquire a negative charge and the human body acquires a positive charge as it loses electrons.
So, shirt becomes negatively charged and Kelvin's body becomes positively charged.