I believe the answer is: independent variable
Independent variable is the type of variables which would be influenced by the control group that handled by the researchers. In every research Independent variable represent the things that the researchers want to measures through correlation with other factors.
D) Nitrogen-fixing bacteria in root nodules of legumes.
Social change is not both planned and unplanned
Answer:
Because the Caribbean invests a lot in tourism and transportation is essential in tourism.
Explanation:
The Caribbean region is very dependent on tourism and tourism, in turn is very dependent on an efficient and reliable transport network, where tourists will be able to move around the region with sufficient comfort and security. Without safe transport, the Caribbean region would not be able to maintain one of its main economic sources.
