Answer:
conducting research to observe things in their natural habitat.
Explanation:
for example if someone is studying a certain culture, they would study the peoples culture, folklore, ways of living, and would interview them.
A stable ecosystem is characterized by having a continual input of energy from the sun. This is required in order to sustain or maintain a stable structure. Without proper supply of energy, life would not exist. Hope this answers the question.
D. Fossils
adaptions, mutations, and traits are all characteristics, not actual remains
Microorganisms are used in making of bread, tooth paste, dough, pizza etc. they are even used in making vaccines antibiotics. only some microorganisms are harmful