Which of these is extinct?
a) Dodo bird b) Asiatic lion
c)Elephant d) Leopard

A - dodo bird

Explanation:

Dodo bird : is an extinct flightless bird that was endemic to the island of Mauritius

Asiatic lion - is a panthera leo leo population in India

Elephant - are mammals of the family Elephantidae and the largest existing land animals

Leopard- is one of the five extant species in the genus panthera, a member of the folidae.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.

for a different answer set the answer would be because the oxygen in the water had depleted (apex)