One reason it was a health threat is it caused teeth to become ground down which would then lead to infections. The same was true with their eyes and lungs, sand would be blown into their eyes or inhaled into their lungs and then could cause infections.
Mutualism is an ecological relationship where two-member benefits (Option 2).
<h3>What is an ecological relationship?</h3>
An ecological relationship is an association between two or more species, which may have positive, negative or neutral outcomes.
Mutualism is a symbiotic ecological relationship because both species are benefited from such interaction.
In conclusion, mutualism is an ecological relationship where two-member benefits (Option 2).
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Answer:
The Treaty of Paris was most generous to the winners. The United States received the Philippines and the islands of Guam and Puerto Rico. Cuba became independent, and Spain was awarded $20 million dollars for its losses.
The treaty prompted a heated debate in the United States.
Answer:
Social referencing.
Explanation:
While acquiring new knowledge of environmental events, infants are able to regulate their attitudes towards people and objects in compliance with the affective display of their caregivers. Social referencing refers to the observation of facial expression by children to understand the situation, persons and the environment around them.
