20. The author’s main purpose is to a. persuade readers to develop larger social circles.

b. discuss the positive and negative aspects of social networks.

c. entertain with accounts of the many ways social networks affect people.

d. warn readers of the pressures that can be caused by loved ones.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.