1. write about how the group of rock layers in record a formed. include tilting, erosion, and folding.

Explanation:

the rocks that are afloat in the continents suffer decomposition producing sediments, 1. inclination is a decline caused by man, when it wants to study the land. 2. The erosion of the transported material receives the name of sediment and will give rise to the sedimentary deposits that, transform into sedimentary rocks 3. Folding are ripples that arise in flat rocks, with amplitudes from cm to km.

i believe the answer is true.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.