It is hydropower the first option
The first question is D. desert
and the second answer is B. the study of land
because geography's meaning is the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources, land use, and industries. HOPE THIS HELPS
Since when you write in scientific notation and the first number has to be infront the decimal, it would be 6x10^-6 and it would be a negative because you moved the decimal to the write and not the left to make it positive hope this helps :))))
