Answer:
a
Explanation:
Because of their valence electron
Carbon, Silicon and germanium has 4 as their valence electron
Answer:
At the global scale, they are a significant source of emitted carbon, contributing to global warming which could lead to biodiversity changes. ... The consequence of repeated burns is detrimental because it is a key factor in the impoverishment of biodiversity in rain forest ecosystems.
Answer:
c
Explanation:
it is corundum now please follow me