QUES: The three followed each there part of the expedition with the following headings Earths creation The Earths downfall and the Earths sequels

correct the punctuation.

CORRECTED: The three followed each there part of the expedition, with the following headings "Earth's creation, The Earth's downfall and the Earth's sequels".

QUES: A chemical screening was carried out with the purpose of determining the content of volatile organic substances in the selected products

correct the punctuation.

CORRECTED: A chemical screening was carried out with the purpose of determining the content of volatile, organic substances in the selected products.

QUES: The GARDENA combisystem Snow Shovel ES 50 is made of robust wearresistant and flexible plastic

correct the punctuation.

CORRECTED:
The GARDENA combisystem Snow Shovel ES 50 is made of robust-, wear-resistant- and flexible plastic.