Lungs and limbs are the adaptations which originated in some fishes and enabled vertebrates to thrive on land and is therefore denoted as option B.
What is a Vertebrate?
This refers to organisms which possess backbones while on the other hand invertebrates are characterized by the absence of the backbone.
The presence of limbs enabled organisms to move freely in search of food and other functions on land. The presence of lungs enables appropriate respiration on land for the survival of these organisms.
This is therefore the reason why land and limbs were chosen as the most appropriate choice.
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The options include the following:
a. Limbs
b. Lungs and limbs
c. Lungs
d. Fins
e. Lungs and fins
