Answer:
<em>a. Cross-sectional study</em>
Explanation:
A cross-sectional analysis <em>includes at one particular point in time looking at data from a population.</em> Participants are chosen based on specific variables of interest in this type of study.
For developmental psychology, cross-sectional experiments are often used, but this approach is also used in many other fields, including social science and education.
they are both two types of grasslands
<span><span>Hi JayBo22!
Volcanic gas have water vapor, carbon dioxide and sulfur!
Fun Fact: You can find nitrogen, argon, helium, neon carbon dioxide, hydrogen, and methane.
I hope this helps;)
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