D as some countries don’t have certain things as other countries have more than they need so they trade the item for another item.
The independent variable is the temperature.
The study aims to assess how the temperature level affects another variable, that, in turn, will be the dependent variable: the mood of the participants. The aim of the study is to conclude whether it is possible or not to infer causality between those two, in other words, to see whether different levels of temperature (<em>the cause</em>), trigger the emergence of a certain type of mood <em>(the effect).</em>
Taking a ball up 5 stories: gaining potential energy
Dropping the ball from 5 stories: gaining Kinetic energy
Answer:
Because drugs are addictive.
Explanation:
Mostly the one who use drugs are teenagers , with increased level of hormonal activity . Even if an individual take the drug once , his brain would force him to take more . this is how drug demand gets increased day by day .
A teenager who learns most of the things at this age gets easily addicted to this bad . and hence it is very to stop it in either way
