Answer:
Metre is correct answer. Please Mark it as brainlist answer.
the air and all the gasses
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.
almost any living organisms like animals and humans. Im not so sure about plants though. happy studying! :)