Sandstone is a sedimentary rock. Which two processes cause sand particles to form sandstone? O cementation and cooling
O compaction and cementation
O cooling and erosion
O erosion and heating

The development of_ factored in the development of complex organisms.

Which of the following is the main purpose of a human community?

Some plants rely on the wind to reproduce an example is it’s important for plants to use the forces of nature to reproduce because 1. 1a white tuft of dandelion seeds 2a spiked burrs surrounding seeds 3a hard shell on a walnut? 2. 1b require pollination to reproduce 2b reproduce only asexually 3b cannot move about freely?