Answer:
Controlled Investigation
Field Investigation
Explanation: In a controlled experiment, the scientist has total control over the environmental conditions. The temperature, humidity, amount of light, amount of noise, materials, etc. can all be controlled and monitored by the scientist throughout the investigation.
A field investigation involves observing and measuring plants and animals (including people) in their natural habitat or environment without changing, harming, or altering the setting or any part of the test subjects. Like in a controlled experiment, the scientist chooses to observe and measure how one change (IV) has a measurable effect (DV) on something else.
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Breathing acts in the maintenance of homeostasis as it regulates the entry of air, controls the output of carbon dioxide from the blood and contributes to the supply of oxygen to the cells of the body.
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Cellular resperation because photosynthesis is used for plants while cellur respiration is used for both plants and animals
