The heliots (or messenians) revolted and outnumbered the spartans so they were in fear of any more revolts
Answer:
developmental psychology
Explanation:
Developmental psychology -
It is a type of study regarding the changes human beings undergoes during his or her life span , is referred to as the developmental psychology.
The study involve even the minute changes that occurs as the baby is born till the death of the organism .
Hence , from the given scenario of the question , Dr. Troxell’s area of specialization is most likely in developmental psychology .
The answer to your question is,
because the water slows down, the sediment drops to the bottom
-Mabel <3