Answer:
c.
Mangrove forests are named for the mangrove tree.
Explanation:
Salt Marshes and Mangroves
Edge 2020
Answer is a. therapeutic communities.
Therapeutic communities are a common form of long-term residential treatment for substance use disorders. These communities provide drug-free environments in which people with addictive problems live together in an organized and structured manner to promote change toward recovery and re-socialization. Some such groups evolved into self-supporting and democratically run residences to support abstinence and recovery from drug use.
The answer to the question is "4 chromosomes".
The genes that code for a hemoglobin is found on 4 chromosomes. Two of this code is for the alpha globin while the remaining two genes that are code is for the beta globin.