Which of the following characterizes preschoolers' social interactions?
they still play equally with both genders.
they begin to engage in negotiation and compromise.
they are unable to imagine another's viewpoint.
they engage in parallel play more often than interactive play.
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Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer