Question

read the text.
millions of americans replace their cell phones every couple of years, and many of the old phones get tossed into the trash. this creates a dangerous and avoidable problem. the phones go directly to landfills or trash - processing plants, where their lithium batteries can explode and start fires. in addition, a variety of toxic chemicals can seep out, contaminating soil and water.
donating used phones to charity is a wise solution. some charitable organizations dismantle phones and sell the parts; others overhaul phones and give them to people in need. the charities that accept phones range from local church groups to international anti - poverty organizations. wireless companies may also take back phones for recycling—a better choice than trashing them—but the phones may not go to a good cause. join me and donate your phone for good!
which author’s purpose is suggested by the text?
to explain the steps to take when throwing out an old phoneto inform readers about what happens to cell phones at trash sitesto convince readers of the benefits of donating used cell phones

Explanation:

The text first presents the problem of old cell - phones being trashed (dangers like battery explosions and chemical contamination). Then it emphasizes donating used phones to charity as a solution (mentions different charities and what they do with the phones). The last sentence "Join me and donate your phone for good!" is a call - to - action, which indicates the author is trying to convince readers.

Answer:

to convince readers of the benefits of donating used cell phones