I would say d because mars for us maybe was with ice till the big bang and made mars really hot.
#1: Climate change, Pollution, Overfishing, and Disaster Outbreaks
The right answer is It connects amino acids.
• Amino acids are the building blocks of proteins.
• There are 21 amino acids, but only one type of binding used to connect them: it is the peptide bond.
The peptide bond is formed during the translation step by a covalent bond between an α-amino group of an amino acid and the carboxylic group of another amino acid. A molecule of water is eliminated.
The first level of organization are living cells
