Answer:
Secondary succession is usually faster than primary succession because soil and nutrients are already present due to 'normalization' by previous pioneer species, and because roots, seeds and other biotic organisms may still be present within the substrate.
Explanation:
that's all i got really i hope it helped a little.
Speed of light is usually time and space so probably C
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution.
The sweating or shivering are hunpman examples of homeostasis
