A heart attack happens when part of the heart muscles
dies or damaged
true
false
​

Explanation:

When damage or death of part of the heart muscle occurs as a result of ischemia, it's called a heart attack, or myocardial infarction (MI). About every 40 seconds, someone in the United States has a heart attack.

false

Explanation:

It is false, because whan heart ventricle are damaged heart attack happened.

please Mark as BRAINLIST answer

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

d.

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