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Natural immunity is inborn/ inherited/ passed from parents to off springs while acquired immunity is obtained in life.
Natural sources of energy are;solarfirewoodgeothermalbiogashydro-electric power
Factors that favour the growth of natural forests on the slope of mount in Kenya are;The area receives high rainfall throughout the year that provides water for growth of trees.The area has cool climate/ moderate temperature that support a wide variety of tree species.The area has deep/rich volcanic soils that provide proper anchorage/nutrients to support trees.The area is protected government zone/gazette forest that prevents human encroachment allowing trees to grow without interference.The area has steep slopes that discourage agriculture hence growth of trees flourish.
Natural forests include;Tropical hardwood forestsTemperate hardwood forestsConiferous forests
Natural means of ventilating a room include;Constructing ventsConstructing chimneysOpen doorsOpen windows