Answer:
Glacier
Explanation:
Glaciers erode the Earth and cause distinctive u-shaped valleys.
Answer:
In general, life needs to maintain a pH level between 05-8 ( second choice)
N positron emission, also called positive beta decay (β+-decay), a proton in the parent nucleus decays into a neutron that remains in the daughter nucleus, and the nucleus emits a neutrino and a positron, which is a positive particle like an ordinary electron in mass but of opposite charge.
