How many species of vertebrates are there? a. 50 thousand c. 5 million b. 200 thousand d. 2 thousand

a. 50 thousand

Explanation:

From the answer option, the closest true number is around 50 thousand.

It is estimated there are around 62 to 69 thousand species of vertebrates in the world.

Vertebrates are one of the major groups of animals and they are the ones that have the backbone. In the group of vertebrates, we can divide animals into further subgroups of amphibians, mammals, reptiles, fish, and birds. Therefore, we can see there is a large number of animals that we know of which are included in the vertebrates group.

1.creeping like a snail is a simile used in this poem and it means the child is going to school unwillingly./a child is unwilling to go to school.

2. man becomes very frail and loses his physical strength when he becomes old, so much that his leggings that used to fit him snugly when he was in his youth are now too loose for him to wear, and that his shank has shrunk so much that this worldly stage is too big for a feeble actor like him. although, 'his youthful hose' just refers to his leggings/pants/ to shrink from danger; to shrink from contact.

3.the words "sans" means "without." it is a french word that is often used in english even today. so he is saying that in the last age of a man, the man is without eyes, taste, or anything else. he also says that this is the "last stage of all" and that it is the stage that ends a man's "history."

hope this !

answer: tomorrow

explanation: