Secondary since plants/animals already lived there, but got killed/driven out of the area they lived/thrived in/on.
Good roots, sunlight, and a stable base
When excess aromatic aldehyde( acetone) reacts with another element such as chlorine trichloroacetone is formed.
<h3>What is aromatic aldehyde?</h3>
Aromatic aldehyde is defined as the chemical compound that contains the functional group CHO, such as benzaldehyde and acetone, which has an almond-like odour profile.
When excess aromatic aldehyde( acetone) reacts with another element such as chlorine, trichloroacetone is formed.
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Answer:
Orchids have some unique features which help them in the evolutionary race. They produce masses of pollen (which improves the chances of pollination), very light seeds (which makes them easier to spread) and can grow on other plants using them to support their own growth.
B is the answer, it wants me to type more so hehehhe