C. The area of the US doubled
Answer:
C. Border area
Explanation:
Because or the semitropical climate at the border areas like Texas cultivation of citrus and vegetables is easy. The valley of Rio grande and the Winter garden in South Texas are the major producers of these two crops
B. If there is one person who dies for every person that is born then there is a 0% difference in the population. If it were A, then population would be declining. If it were C then it would be declining as well. If it were D it would be increasing then. Answer is B.
The first layer is the CRUST
The second layer is the MANTLE
The third layer is the OUTER CORE
The final layer is the INNER CORE
(Scientists have proved for the inner core to be solid)
The correct answer is A) at least 500.
The rocks in which the fossils are found, are more often then not, indicators of the age of the fossil itself. So if the estimate of the fossil's age is 500 MYA then the rock is of at least the same age, most of the time older then the fossil.
