What are some ways to cause mechanical weathering?

Mechanical weathering is the physical breakdown of fragmented rocks, due to changes in temperature, humidity and biological activity. Temperature When the rocks and minerals become hot, there are differences in tension in their structure.

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.