In the bucal cavity of human beings, digestion of which of the following get started

The type of family in which one spouse(man or woman) has several other spouses is called?

The type of hazardous pollution caused by automobile is ______

Herbert Macaulay is considered as the founder of Nigerian Nationalism. He was a Nigerian nationalist, politician, engineer, architect, journalist, and musician and is considered by many Nigerians as the founder of Nigerian nationalism.

Which of the following is not an equipment/facility used in badminton games?