Which statement is true about the differences between plant and animal cells? A) Only plant cells have cytoplasm. Reactivate B) Animal cells are always larger than plant cells. Reactivate C) Plant cells have vacuoles, but animal cells do not. Reactivate D) Only plant cells have chloroplasts that help make food during photosynthesis.

your answer is "the 1950's"

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

maybe because its impossible for balloons to lift a whole entire house.