A bell rolling across the foor keeps moving until it is stopped by friction. This example demonsszes the work prindide
Newton's Second Law of Motion
Newton's Third Law of Motion
Nentor's First Law of Motion

the correct answer is c   with the systems

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).