The need for natural resource should increase.
General Westmoreland was the chief commanding officer during the Vietnam War. After his tenure Creighton Abrams took over.
Answer:
Due to the large number of fossils being discovered at that time Darwin proposed that species change over long periods of time.
Explanation:
The theory of Darwin was that the species change in accordance to their environment, thus they develop advantageous traits so that they can be more competitive.
Answer:
Plants produce oxygen during photosynthesis, and they also need oxygen gas from the air for cellular respiration
Explanation:
