Final answer:
Fleas have a)laterally compressed bodies and sucking mouthparts, but they do not have wings and are not restricted to increased prevalence in springtime alone.
Step-by-step explanation:
The true statement about fleas is that their bodies are laterally compressed. Unlike some other insects, they do not have wings. Fleas are also known for having sucking mouthparts which they use to feed on the blood of their hosts.
Usually warm-blooded vertebrates such as mammals and birds. They do not have chewing mouthparts. These ectoparasites are adapted to their way of life with specialized features to thrive on their hosts.
Although fleas are found year-round, they are often more prevalent during warm and humid conditions which may not strictly correspond to "springtime" depending on the geographical location and climate.