14. Who was Eratosthenes and what was his significant achievement as it relates to geography and cartography?

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.

The problem of malnutrition in bangladesh is caused in part by "over population."hope my answer has you : )

Drought resistance because they are close to a lot of supplys 

Temperature, rainfall and relative humidity.