Answer:
a longitudinal design
Explanation:
Longitudinal study: This is an observational method of research, that gathers data from the same participants frequently or repeatedly over a while. This research can take plenty of time, and it can extend over months, years or decades. Also known as a panel study or longitudinal survey.
Types of longitudinal studies:
1. Panel Study.
2. Cohort Study.
Answer:
It is because amazon rainforest helps to balqnce the environment of the world and if the trees are cutted down it disbalance the environment
Transportation and telecommunications
The organization of the transportation network is of crucial importance to Congo, a country of continental dimensions, rich economic resources, and limited maritime access. Congo’s generally poor transportation infrastructure is a major factor in its economic underdevelopment, a situation exacerbated by years of civil conflict. The Congo River and its tributaries, historically a chief means of transportation in the country, serve as the main transport arteries. These rivers are supplemented by rail, road, and both private and public air services.
