Answer: Fragment (missing predicate)
Explanation:
A sentence fragment is a sentence that is missing either its subject or its main verb.
The answer to this one is D. This is because the sentence does not have a predicate. A sentence's predicate describes what is happening. A sentence is considered a fragment if it lacks a predicate. Consider the following example:
<em>My cousin Fred.</em>
We know Fred is the subject of this phrase, but we have no idea what he's up to. As a result, this isn't a complete sentence.
As "three fish and a turtle" has 2 subjects, the three fish and the turtle, but no predicate to show what they're doing, the sentence is a fragment missing a predicate.
This is how to solve the problem:
We know that the growth rate is constant for both species of plants. So we can say that the height is a linear function of the number of days since d = 0.
Assumption (1 month = 30 days)
Species A:
Growth rate = 2 cm/month = 2/30 = 1/15 cm/day
Height on day d = 0: 12 cm
Height: H(d) = 12 + d/15
Species B:
Growth rate = 3 cm/month = 3/30 = 1/10 cm/day
Height on day d = 0: 10 cm
Height: H(d) = 10 + d/10