Ocean floor is the rocks from which source would most likely contain the
highest percentage of iron-bearing minerals.
<h3>Iron formation in Ocean floor</h3>
Iron are formed as thin banded forms in the ocean floor as a result of the
formation of oxygen through organisms present in the ocean such as
cyanobacteria. The oxygen formed result in the formation of these iron ores.
The iron-bearing minerals include the following:
Read more about Ocean floor here brainly.com/question/19428860
Answer
The answer is A I think...
Although the actual questions are missing from your ask, here's how you can tell.
If the study will be messed up (added bias) through interaction with the subjects the study should be observational. For example if a biologists wanted to study the eating habits of wild birds in the tropics, they would need to do an observational study. if they did a controlled experiment, the birds will change their eating habits based on human interaction, thus making the study invalid.
If the study requires specific measurements, close monitoring, or contact and interaction with the subjects the study should be a controlled experiment. For example, if a scientist wanted to test out a new drug, the health of patients would need to be closely monitored.
It is C. This thing is making me write at least 20 characters so...
<span>Hi,
The food is chewed and grinned up from the teeth and broken down from saliva, then the epiglottis shuts covering the trachea allowing food to travel
down the esophagus, once it travels down it reaches the stomach which is mechanically and chemically broken down from the stomach muscles and the hydrochloric acid. Then it goes into small intestine, then the large intestine where it is determined to be a solid, liquid, or gas and the liquid is normally drained out causing it to be solid, Then it is eventually stored in the rectum and released through the anus. There are three helping organs the liver, gallbladder, and pancreas which produce the digestive enzymes but arent part of the digestive tract,
Hoped I Helped</span>
