Which sentence contains an inappropriate shift in tense?

a.
i am reading a poem that was written thousands of years ago.

b.
i finished painting the fence, but barbara is still repairing the gate.

c.
hummingbirds are hovering over the geraniums while caterpillars munched leaves.
i its c but iam not sure

Esther is a person and who makes friends easily. parallel structure how?

Bicycle riding should be encouraged, and adding bicycle lanes will increase the number of riders. it is healthier for people to ride than to sit angrily in traffic. it is healthier for everyone to breathe cleaner air. sharing the road can be tricky, but there are things that can be done. so, add the bike lanes and get rolling! which sentence would improve this conclusion? every town should consider adding bicycle lanes, because it is a great idea. organizing safety classes for drivers and cyclists will ensure that everyone knows the rules. do not listen to negative people who complain about anything new. it is true that some people might get injured, but even walking can be dangerous.

Read the passage. then, identify the theme that is supported by the passage. most ships cannot survive a terrible thunderstorm. the ocean is an angry beast that will tame any who try to control it. the gods have the power to control human destiny. men are willing to die to eat the delicious cattle of the gods.