C. 6.81x10^-4
It is negative 4 because the 6 is 4 digits away from the first 0.
Scientific notation has one number and then the decimal place so it can not be A or E.
A I think sorry if your wrong :( .
Answer:
D a photograph
Explanation:
because it help to know what happened through the help of picture. it also help to increase memory power..
Natural Vegetation means the vegetation is growing by itself for example you have been growing onions so it been grown by it self
with sunlight and water
Wildlife means the adaptation of animals where the animals live.
Desertification, non-reusable resource, fjord
