Answer:
D it is taken in from the air
Explanation:
Carbon dioxide is in the air and plants use it to make food.
Diatoms have cell walls composed of silicon dioxide.
A. silicon dioxide.
There are approx 100 billion
Assuming this is multiple choice, the answer would be "niche". An organism's niche is where that certain organism fits into an ecosystem, or what their part to play is.
The answer is C. This is because the other choices involve experiences
(most during childhood a significant phase in humans
development) that are environmental factors that impact on the human personality.
In choice C, there is little development since its adulthood phase and on the other hand, refusing to display warmth and emotion is
not an experience.
