UNICEF and its partners are trying to help a generation of Rwandan children recover their lives, especially in the areas of health, counseling and education:
offering support to households headed by minors through the provision of pedagogical materials, guidance, activities for income generation and professional training
preventing the spread of HIV / AIDS through education and guidance
providing immunization, and
supporting the official education system and helping children outside the school system
Because it is important to know the composition of the object
Density is the ratio of the mass of a sample to the volume occupied by that mass, and expresses how much mass there is per unit volume of a given portion of matter. Density is a physical property of extreme importance in the characterization, identification and use of substances or materials.
The answer is B because the text mentioned the author