Options for the question have not been given. They are as follows:
type of soil
type of plants
exposure to sunlight
method for measuring the growth
Answer:
exposure to sunlight
Explanation:
A scientific experiment has an experimental group and a control group. Control group is included to omit any error in results due to the factors other than the variable factor. Experimental group is the one exposed to different levels of the variable factor.
Here, Carlo wants to determine the the effect of day length on plants' growth. The test variable here is thus the duration of sunlight. In experimental group, this duration will be changed to determine its effect. In control group it will be kept constant so that results from other factors can be excluded from the observed experimental result.
Answer: Image D has the most direct sunlight
Explanation:
Since direct sunlight is supposed to be intense, it can't be B or C. Sunlight is most intense in summe, so winter and fall are out. Now we have A and D left. The sun is illustrated in image D and the area the sun covers is larger than image A's, so image D has the most direct sunlight.
Answer:
What is the name of this website
or the book?
